21907280

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1091}}^1$

素因数の和:1355

約数の個数: 40

約数和(自身を含む): 51184224

約数和(自身を除く): 29276944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1091, 1255, 2008, 2182, 2510, 4016, 4364, 5020, 5455, 8728, 10040, 10910, 17456, 20080, 21820, 43640, 87280, 273841, 547682, 1095364, 1369205, 2190728, 2738410, 4381456, 5476820, 10953640, 21907280]

約数ペア:

[(1, 21907280), (2, 10953640), (4, 5476820), (5, 4381456), (8, 2738410), (10, 2190728), (16, 1369205), (20, 1095364), (40, 547682), (80, 273841), (251, 87280), (502, 43640), (1004, 21820), (1091, 20080), (1255, 17456), (2008, 10910), (2182, 10040), (2510, 8728), (4016, 5455), (4364, 5020)]