21121360

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{883}}^1$

素因数の和:932

約数の個数: 80

約数和(自身を含む): 55246464

約数和(自身を除く): 34125104

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, 883, 920, 1040, 1196, 1495, 1766, 1840, 2392, 2990, 3532, 4415, 4784, 5980, 7064, 8830, 11479, 11960, 14128, 17660, 20309, 22958, 23920, 35320, 40618, 45916, 57395, 70640, 81236, 91832, 101545, 114790, 162472, 183664, 203090, 229580, 264017, 324944, 406180, 459160, 528034, 812360, 918320, 1056068, 1320085, 1624720, 2112136, 2640170, 4224272, 5280340, 10560680, 21121360]

約数ペア:

[(1, 21121360), (2, 10560680), (4, 5280340), (5, 4224272), (8, 2640170), (10, 2112136), (13, 1624720), (16, 1320085), (20, 1056068), (23, 918320), (26, 812360), (40, 528034), (46, 459160), (52, 406180), (65, 324944), (80, 264017), (92, 229580), (104, 203090), (115, 183664), (130, 162472), (184, 114790), (208, 101545), (230, 91832), (260, 81236), (299, 70640), (368, 57395), (460, 45916), (520, 40618), (598, 35320), (883, 23920), (920, 22958), (1040, 20309), (1196, 17660), (1495, 14128), (1766, 11960), (1840, 11479), (2392, 8830), (2990, 7064), (3532, 5980), (4415, 4784)]