21638840

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{173}}^1$

素因数の和:296

約数の個数: 64

約数和(自身を含む): 50738400

約数和(自身を除く): 29099560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 59, 106, 118, 173, 212, 236, 265, 295, 346, 424, 472, 530, 590, 692, 865, 1060, 1180, 1384, 1730, 2120, 2360, 3127, 3460, 6254, 6920, 9169, 10207, 12508, 15635, 18338, 20414, 25016, 31270, 36676, 40828, 45845, 51035, 62540, 73352, 81656, 91690, 102070, 125080, 183380, 204140, 366760, 408280, 540971, 1081942, 2163884, 2704855, 4327768, 5409710, 10819420, 21638840]

約数ペア:

[(1, 21638840), (2, 10819420), (4, 5409710), (5, 4327768), (8, 2704855), (10, 2163884), (20, 1081942), (40, 540971), (53, 408280), (59, 366760), (106, 204140), (118, 183380), (173, 125080), (212, 102070), (236, 91690), (265, 81656), (295, 73352), (346, 62540), (424, 51035), (472, 45845), (530, 40828), (590, 36676), (692, 31270), (865, 25016), (1060, 20414), (1180, 18338), (1384, 15635), (1730, 12508), (2120, 10207), (2360, 9169), (3127, 6920), (3460, 6254)]