21191612

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 42688800

約数和(自身を除く): 21497188

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 89, 178, 241, 247, 356, 482, 494, 964, 988, 1157, 1691, 2314, 3133, 3382, 4579, 4628, 6266, 6764, 9158, 12532, 18316, 21449, 21983, 42898, 43966, 59527, 85796, 87932, 119054, 238108, 278837, 407531, 557674, 815062, 1115348, 1630124, 5297903, 10595806, 21191612]

約数ペア:

[(1, 21191612), (2, 10595806), (4, 5297903), (13, 1630124), (19, 1115348), (26, 815062), (38, 557674), (52, 407531), (76, 278837), (89, 238108), (178, 119054), (241, 87932), (247, 85796), (356, 59527), (482, 43966), (494, 42898), (964, 21983), (988, 21449), (1157, 18316), (1691, 12532), (2314, 9158), (3133, 6764), (3382, 6266), (4579, 4628)]