28131980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{23059}}^1$

素因数の和:23129

約数の個数: 24

約数和(自身を含む): 60048240

約数和(自身を除く): 31916260

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 23059, 46118, 92236, 115295, 230590, 461180, 1406599, 2813198, 5626396, 7032995, 14065990, 28131980]

約数ペア:

[(1, 28131980), (2, 14065990), (4, 7032995), (5, 5626396), (10, 2813198), (20, 1406599), (61, 461180), (122, 230590), (244, 115295), (305, 92236), (610, 46118), (1220, 23059)]