18784120

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:284

約数の個数: 64

約数和(自身を含む): 44161920

約数和(自身を除く): 25377800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 67, 86, 134, 163, 172, 215, 268, 326, 335, 344, 430, 536, 652, 670, 815, 860, 1304, 1340, 1630, 1720, 2680, 2881, 3260, 5762, 6520, 7009, 10921, 11524, 14018, 14405, 21842, 23048, 28036, 28810, 35045, 43684, 54605, 56072, 57620, 70090, 87368, 109210, 115240, 140180, 218420, 280360, 436840, 469603, 939206, 1878412, 2348015, 3756824, 4696030, 9392060, 18784120]

約数ペア:

[(1, 18784120), (2, 9392060), (4, 4696030), (5, 3756824), (8, 2348015), (10, 1878412), (20, 939206), (40, 469603), (43, 436840), (67, 280360), (86, 218420), (134, 140180), (163, 115240), (172, 109210), (215, 87368), (268, 70090), (326, 57620), (335, 56072), (344, 54605), (430, 43684), (536, 35045), (652, 28810), (670, 28036), (815, 23048), (860, 21842), (1304, 14405), (1340, 14018), (1630, 11524), (1720, 10921), (2680, 7009), (2881, 6520), (3260, 5762)]