21016080

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{101}}^1$

素因数の和:154

約数の個数: 180

約数和(自身を含む): 75717252

約数和(自身を除く): 54701172

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 30, 34, 36, 40, 45, 48, 51, 60, 68, 72, 80, 85, 90, 101, 102, 120, 136, 144, 153, 170, 180, 202, 204, 240, 255, 272, 289, 303, 306, 340, 360, 404, 408, 505, 510, 578, 606, 612, 680, 720, 765, 808, 816, 867, 909, 1010, 1020, 1156, 1212, 1224, 1360, 1445, 1515, 1530, 1616, 1717, 1734, 1818, 2020, 2040, 2312, 2424, 2448, 2601, 2890, 3030, 3060, 3434, 3468, 3636, 4040, 4080, 4335, 4545, 4624, 4848, 5151, 5202, 5780, 6060, 6120, 6868, 6936, 7272, 8080, 8585, 8670, 9090, 10302, 10404, 11560, 12120, 12240, 13005, 13736, 13872, 14544, 15453, 17170, 17340, 18180, 20604, 20808, 23120, 24240, 25755, 26010, 27472, 29189, 30906, 34340, 34680, 36360, 41208, 41616, 51510, 52020, 58378, 61812, 68680, 69360, 72720, 77265, 82416, 87567, 103020, 104040, 116756, 123624, 137360, 145945, 154530, 175134, 206040, 208080, 233512, 247248, 262701, 291890, 309060, 350268, 412080, 437835, 467024, 525402, 583780, 618120, 700536, 875670, 1050804, 1167560, 1236240, 1313505, 1401072, 1751340, 2101608, 2335120, 2627010, 3502680, 4203216, 5254020, 7005360, 10508040, 21016080]

約数ペア:

[(1, 21016080), (2, 10508040), (3, 7005360), (4, 5254020), (5, 4203216), (6, 3502680), (8, 2627010), (9, 2335120), (10, 2101608), (12, 1751340), (15, 1401072), (16, 1313505), (17, 1236240), (18, 1167560), (20, 1050804), (24, 875670), (30, 700536), (34, 618120), (36, 583780), (40, 525402), (45, 467024), (48, 437835), (51, 412080), (60, 350268), (68, 309060), (72, 291890), (80, 262701), (85, 247248), (90, 233512), (101, 208080), (102, 206040), (120, 175134), (136, 154530), (144, 145945), (153, 137360), (170, 123624), (180, 116756), (202, 104040), (204, 103020), (240, 87567), (255, 82416), (272, 77265), (289, 72720), (303, 69360), (306, 68680), (340, 61812), (360, 58378), (404, 52020), (408, 51510), (505, 41616), (510, 41208), (578, 36360), (606, 34680), (612, 34340), (680, 30906), (720, 29189), (765, 27472), (808, 26010), (816, 25755), (867, 24240), (909, 23120), (1010, 20808), (1020, 20604), (1156, 18180), (1212, 17340), (1224, 17170), (1360, 15453), (1445, 14544), (1515, 13872), (1530, 13736), (1616, 13005), (1717, 12240), (1734, 12120), (1818, 11560), (2020, 10404), (2040, 10302), (2312, 9090), (2424, 8670), (2448, 8585), (2601, 8080), (2890, 7272), (3030, 6936), (3060, 6868), (3434, 6120), (3468, 6060), (3636, 5780), (4040, 5202), (4080, 5151), (4335, 4848), (4545, 4624)]