21749680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{349}}^1$

素因数の和:422

約数の個数: 80

約数和(自身を含む): 54684000

約数和(自身を除く): 32934320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 41, 76, 80, 82, 95, 152, 164, 190, 205, 304, 328, 349, 380, 410, 656, 698, 760, 779, 820, 1396, 1520, 1558, 1640, 1745, 2792, 3116, 3280, 3490, 3895, 5584, 6232, 6631, 6980, 7790, 12464, 13262, 13960, 14309, 15580, 26524, 27920, 28618, 31160, 33155, 53048, 57236, 62320, 66310, 71545, 106096, 114472, 132620, 143090, 228944, 265240, 271871, 286180, 530480, 543742, 572360, 1087484, 1144720, 1359355, 2174968, 2718710, 4349936, 5437420, 10874840, 21749680]

約数ペア:

[(1, 21749680), (2, 10874840), (4, 5437420), (5, 4349936), (8, 2718710), (10, 2174968), (16, 1359355), (19, 1144720), (20, 1087484), (38, 572360), (40, 543742), (41, 530480), (76, 286180), (80, 271871), (82, 265240), (95, 228944), (152, 143090), (164, 132620), (190, 114472), (205, 106096), (304, 71545), (328, 66310), (349, 62320), (380, 57236), (410, 53048), (656, 33155), (698, 31160), (760, 28618), (779, 27920), (820, 26524), (1396, 15580), (1520, 14309), (1558, 13960), (1640, 13262), (1745, 12464), (2792, 7790), (3116, 6980), (3280, 6631), (3490, 6232), (3895, 5584)]