12911260

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:646

約数の個数: 48

約数和(自身を含む): 29060640

約数和(自身を除く): 16149380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 61, 76, 95, 122, 190, 244, 305, 380, 557, 610, 1114, 1159, 1220, 2228, 2318, 2785, 4636, 5570, 5795, 10583, 11140, 11590, 21166, 23180, 33977, 42332, 52915, 67954, 105830, 135908, 169885, 211660, 339770, 645563, 679540, 1291126, 2582252, 3227815, 6455630, 12911260]

約数ペア:

[(1, 12911260), (2, 6455630), (4, 3227815), (5, 2582252), (10, 1291126), (19, 679540), (20, 645563), (38, 339770), (61, 211660), (76, 169885), (95, 135908), (122, 105830), (190, 67954), (244, 52915), (305, 42332), (380, 33977), (557, 23180), (610, 21166), (1114, 11590), (1159, 11140), (1220, 10583), (2228, 5795), (2318, 5570), (2785, 4636)]