19218280

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 44945280

約数和(自身を除く): 25727000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 71, 101, 134, 142, 202, 268, 284, 335, 355, 404, 505, 536, 568, 670, 710, 808, 1010, 1340, 1420, 2020, 2680, 2840, 4040, 4757, 6767, 7171, 9514, 13534, 14342, 19028, 23785, 27068, 28684, 33835, 35855, 38056, 47570, 54136, 57368, 67670, 71710, 95140, 135340, 143420, 190280, 270680, 286840, 480457, 960914, 1921828, 2402285, 3843656, 4804570, 9609140, 19218280]

約数ペア:

[(1, 19218280), (2, 9609140), (4, 4804570), (5, 3843656), (8, 2402285), (10, 1921828), (20, 960914), (40, 480457), (67, 286840), (71, 270680), (101, 190280), (134, 143420), (142, 135340), (202, 95140), (268, 71710), (284, 67670), (335, 57368), (355, 54136), (404, 47570), (505, 38056), (536, 35855), (568, 33835), (670, 28684), (710, 27068), (808, 23785), (1010, 19028), (1340, 14342), (1420, 13534), (2020, 9514), (2680, 7171), (2840, 6767), (4040, 4757)]