21795280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1103}}^1$

素因数の和:1148

約数の個数: 80

約数和(自身を含む): 57496320

約数和(自身を除く): 35701040

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1103, 1235, 1520, 1976, 2206, 2470, 3952, 4412, 4940, 5515, 8824, 9880, 11030, 14339, 17648, 19760, 20957, 22060, 28678, 41914, 44120, 57356, 71695, 83828, 88240, 104785, 114712, 143390, 167656, 209570, 229424, 272441, 286780, 335312, 419140, 544882, 573560, 838280, 1089764, 1147120, 1362205, 1676560, 2179528, 2724410, 4359056, 5448820, 10897640, 21795280]

約数ペア:

[(1, 21795280), (2, 10897640), (4, 5448820), (5, 4359056), (8, 2724410), (10, 2179528), (13, 1676560), (16, 1362205), (19, 1147120), (20, 1089764), (26, 838280), (38, 573560), (40, 544882), (52, 419140), (65, 335312), (76, 286780), (80, 272441), (95, 229424), (104, 209570), (130, 167656), (152, 143390), (190, 114712), (208, 104785), (247, 88240), (260, 83828), (304, 71695), (380, 57356), (494, 44120), (520, 41914), (760, 28678), (988, 22060), (1040, 20957), (1103, 19760), (1235, 17648), (1520, 14339), (1976, 11030), (2206, 9880), (2470, 8824), (3952, 5515), (4412, 4940)]