21105480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:355

約数の個数: 128

約数和(自身を含む): 70502400

約数和(自身を除く): 49396920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 59, 60, 66, 88, 110, 118, 120, 132, 165, 177, 220, 236, 264, 271, 295, 330, 354, 440, 472, 542, 590, 649, 660, 708, 813, 885, 1084, 1180, 1298, 1320, 1355, 1416, 1626, 1770, 1947, 2168, 2360, 2596, 2710, 2981, 3245, 3252, 3540, 3894, 4065, 5192, 5420, 5962, 6490, 6504, 7080, 7788, 8130, 8943, 9735, 10840, 11924, 12980, 14905, 15576, 15989, 16260, 17886, 19470, 23848, 25960, 29810, 31978, 32520, 35772, 38940, 44715, 47967, 59620, 63956, 71544, 77880, 79945, 89430, 95934, 119240, 127912, 159890, 175879, 178860, 191868, 239835, 319780, 351758, 357720, 383736, 479670, 527637, 639560, 703516, 879395, 959340, 1055274, 1407032, 1758790, 1918680, 2110548, 2638185, 3517580, 4221096, 5276370, 7035160, 10552740, 21105480]

約数ペア:

[(1, 21105480), (2, 10552740), (3, 7035160), (4, 5276370), (5, 4221096), (6, 3517580), (8, 2638185), (10, 2110548), (11, 1918680), (12, 1758790), (15, 1407032), (20, 1055274), (22, 959340), (24, 879395), (30, 703516), (33, 639560), (40, 527637), (44, 479670), (55, 383736), (59, 357720), (60, 351758), (66, 319780), (88, 239835), (110, 191868), (118, 178860), (120, 175879), (132, 159890), (165, 127912), (177, 119240), (220, 95934), (236, 89430), (264, 79945), (271, 77880), (295, 71544), (330, 63956), (354, 59620), (440, 47967), (472, 44715), (542, 38940), (590, 35772), (649, 32520), (660, 31978), (708, 29810), (813, 25960), (885, 23848), (1084, 19470), (1180, 17886), (1298, 16260), (1320, 15989), (1355, 15576), (1416, 14905), (1626, 12980), (1770, 11924), (1947, 10840), (2168, 9735), (2360, 8943), (2596, 8130), (2710, 7788), (2981, 7080), (3245, 6504), (3252, 6490), (3540, 5962), (3894, 5420), (4065, 5192)]