21105840

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{739}}^1$

素因数の和:779

約数の個数: 160

約数和(自身を含む): 79280640

約数和(自身を除く): 58174800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 48, 51, 56, 60, 68, 70, 80, 84, 85, 102, 105, 112, 119, 120, 136, 140, 168, 170, 204, 210, 238, 240, 255, 272, 280, 336, 340, 357, 408, 420, 476, 510, 560, 595, 680, 714, 739, 816, 840, 952, 1020, 1190, 1360, 1428, 1478, 1680, 1785, 1904, 2040, 2217, 2380, 2856, 2956, 3570, 3695, 4080, 4434, 4760, 5173, 5712, 5912, 7140, 7390, 8868, 9520, 10346, 11085, 11824, 12563, 14280, 14780, 15519, 17736, 20692, 22170, 25126, 25865, 28560, 29560, 31038, 35472, 37689, 41384, 44340, 50252, 51730, 59120, 62076, 62815, 75378, 77595, 82768, 87941, 88680, 100504, 103460, 124152, 125630, 150756, 155190, 175882, 177360, 188445, 201008, 206920, 248304, 251260, 263823, 301512, 310380, 351764, 376890, 413840, 439705, 502520, 527646, 603024, 620760, 703528, 753780, 879410, 1005040, 1055292, 1241520, 1319115, 1407056, 1507560, 1758820, 2110584, 2638230, 3015120, 3517640, 4221168, 5276460, 7035280, 10552920, 21105840]

約数ペア:

[(1, 21105840), (2, 10552920), (3, 7035280), (4, 5276460), (5, 4221168), (6, 3517640), (7, 3015120), (8, 2638230), (10, 2110584), (12, 1758820), (14, 1507560), (15, 1407056), (16, 1319115), (17, 1241520), (20, 1055292), (21, 1005040), (24, 879410), (28, 753780), (30, 703528), (34, 620760), (35, 603024), (40, 527646), (42, 502520), (48, 439705), (51, 413840), (56, 376890), (60, 351764), (68, 310380), (70, 301512), (80, 263823), (84, 251260), (85, 248304), (102, 206920), (105, 201008), (112, 188445), (119, 177360), (120, 175882), (136, 155190), (140, 150756), (168, 125630), (170, 124152), (204, 103460), (210, 100504), (238, 88680), (240, 87941), (255, 82768), (272, 77595), (280, 75378), (336, 62815), (340, 62076), (357, 59120), (408, 51730), (420, 50252), (476, 44340), (510, 41384), (560, 37689), (595, 35472), (680, 31038), (714, 29560), (739, 28560), (816, 25865), (840, 25126), (952, 22170), (1020, 20692), (1190, 17736), (1360, 15519), (1428, 14780), (1478, 14280), (1680, 12563), (1785, 11824), (1904, 11085), (2040, 10346), (2217, 9520), (2380, 8868), (2856, 7390), (2956, 7140), (3570, 5912), (3695, 5712), (4080, 5173), (4434, 4760)]