21791120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{911}}^1$

素因数の和:960

約数の個数: 80

約数和(自身を含む): 56996352

約数和(自身を除く): 35205232

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 46, 52, 65, 80, 92, 104, 115, 130, 184, 208, 230, 260, 299, 368, 460, 520, 598, 911, 920, 1040, 1196, 1495, 1822, 1840, 2392, 2990, 3644, 4555, 4784, 5980, 7288, 9110, 11843, 11960, 14576, 18220, 20953, 23686, 23920, 36440, 41906, 47372, 59215, 72880, 83812, 94744, 104765, 118430, 167624, 189488, 209530, 236860, 272389, 335248, 419060, 473720, 544778, 838120, 947440, 1089556, 1361945, 1676240, 2179112, 2723890, 4358224, 5447780, 10895560, 21791120]

約数ペア:

[(1, 21791120), (2, 10895560), (4, 5447780), (5, 4358224), (8, 2723890), (10, 2179112), (13, 1676240), (16, 1361945), (20, 1089556), (23, 947440), (26, 838120), (40, 544778), (46, 473720), (52, 419060), (65, 335248), (80, 272389), (92, 236860), (104, 209530), (115, 189488), (130, 167624), (184, 118430), (208, 104765), (230, 94744), (260, 83812), (299, 72880), (368, 59215), (460, 47372), (520, 41906), (598, 36440), (911, 23920), (920, 23686), (1040, 20953), (1196, 18220), (1495, 14576), (1822, 11960), (1840, 11843), (2392, 9110), (2990, 7288), (3644, 5980), (4555, 4784)]