20751990

素因数分解:

$2^1\times 3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{743}}^1$

素因数の和:786

約数の個数: 96

約数和(自身を含む): 61067520

約数和(自身を除く): 40315530

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 19, 21, 30, 35, 38, 42, 49, 57, 70, 95, 98, 105, 114, 133, 147, 190, 210, 245, 266, 285, 294, 399, 490, 570, 665, 735, 743, 798, 931, 1330, 1470, 1486, 1862, 1995, 2229, 2793, 3715, 3990, 4458, 4655, 5201, 5586, 7430, 9310, 10402, 11145, 13965, 14117, 15603, 22290, 26005, 27930, 28234, 31206, 36407, 42351, 52010, 70585, 72814, 78015, 84702, 98819, 109221, 141170, 156030, 182035, 197638, 211755, 218442, 296457, 364070, 423510, 494095, 546105, 592914, 691733, 988190, 1092210, 1383466, 1482285, 2075199, 2964570, 3458665, 4150398, 6917330, 10375995, 20751990]

約数ペア:

[(1, 20751990), (2, 10375995), (3, 6917330), (5, 4150398), (6, 3458665), (7, 2964570), (10, 2075199), (14, 1482285), (15, 1383466), (19, 1092210), (21, 988190), (30, 691733), (35, 592914), (38, 546105), (42, 494095), (49, 423510), (57, 364070), (70, 296457), (95, 218442), (98, 211755), (105, 197638), (114, 182035), (133, 156030), (147, 141170), (190, 109221), (210, 98819), (245, 84702), (266, 78015), (285, 72814), (294, 70585), (399, 52010), (490, 42351), (570, 36407), (665, 31206), (735, 28234), (743, 27930), (798, 26005), (931, 22290), (1330, 15603), (1470, 14117), (1486, 13965), (1862, 11145), (1995, 10402), (2229, 9310), (2793, 7430), (3715, 5586), (3990, 5201), (4458, 4655)]