21753784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{109}}^1$

素因数の和:248

約数の個数: 64

約数和(自身を含む): 47124000

約数和(自身を除く): 25370216

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 101, 104, 109, 152, 202, 218, 247, 404, 436, 494, 808, 872, 988, 1313, 1417, 1919, 1976, 2071, 2626, 2834, 3838, 4142, 5252, 5668, 7676, 8284, 10504, 11009, 11336, 15352, 16568, 22018, 24947, 26923, 44036, 49894, 53846, 88072, 99788, 107692, 143117, 199576, 209171, 215384, 286234, 418342, 572468, 836684, 1144936, 1673368, 2719223, 5438446, 10876892, 21753784]

約数ペア:

[(1, 21753784), (2, 10876892), (4, 5438446), (8, 2719223), (13, 1673368), (19, 1144936), (26, 836684), (38, 572468), (52, 418342), (76, 286234), (101, 215384), (104, 209171), (109, 199576), (152, 143117), (202, 107692), (218, 99788), (247, 88072), (404, 53846), (436, 49894), (494, 44036), (808, 26923), (872, 24947), (988, 22018), (1313, 16568), (1417, 15352), (1919, 11336), (1976, 11009), (2071, 10504), (2626, 8284), (2834, 7676), (3838, 5668), (4142, 5252)]