139038520

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{56983}}^1$

素因数の和:57055

約数の個数: 32

約数和(自身を含む): 317970720

約数和(自身を除く): 178932200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 56983, 113966, 227932, 284915, 455864, 569830, 1139660, 2279320, 3475963, 6951926, 13903852, 17379815, 27807704, 34759630, 69519260, 139038520]

約数ペア:

[(1, 139038520), (2, 69519260), (4, 34759630), (5, 27807704), (8, 17379815), (10, 13903852), (20, 6951926), (40, 3475963), (61, 2279320), (122, 1139660), (244, 569830), (305, 455864), (488, 284915), (610, 227932), (1220, 113966), (2440, 56983)]