21660720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{5309}}^1$

素因数の和:5342

約数の個数: 80

約数和(自身を含む): 71111520

約数和(自身を除く): 49450800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 5309, 10618, 15927, 21236, 26545, 31854, 42472, 53090, 63708, 79635, 84944, 90253, 106180, 127416, 159270, 180506, 212360, 254832, 270759, 318540, 361012, 424720, 451265, 541518, 637080, 722024, 902530, 1083036, 1274160, 1353795, 1444048, 1805060, 2166072, 2707590, 3610120, 4332144, 5415180, 7220240, 10830360, 21660720]

約数ペア:

[(1, 21660720), (2, 10830360), (3, 7220240), (4, 5415180), (5, 4332144), (6, 3610120), (8, 2707590), (10, 2166072), (12, 1805060), (15, 1444048), (16, 1353795), (17, 1274160), (20, 1083036), (24, 902530), (30, 722024), (34, 637080), (40, 541518), (48, 451265), (51, 424720), (60, 361012), (68, 318540), (80, 270759), (85, 254832), (102, 212360), (120, 180506), (136, 159270), (170, 127416), (204, 106180), (240, 90253), (255, 84944), (272, 79635), (340, 63708), (408, 53090), (510, 42472), (680, 31854), (816, 26545), (1020, 21236), (1360, 15927), (2040, 10618), (4080, 5309)]