201908780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{359}}^1\times {\mathrm{461}}^1$

素因数の和:890

約数の個数: 48

約数和(自身を含む): 433097280

約数和(自身を除く): 231188500

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 359, 461, 610, 718, 922, 1220, 1436, 1795, 1844, 2305, 3590, 4610, 7180, 9220, 21899, 28121, 43798, 56242, 87596, 109495, 112484, 140605, 165499, 218990, 281210, 330998, 437980, 562420, 661996, 827495, 1654990, 3309980, 10095439, 20190878, 40381756, 50477195, 100954390, 201908780]

約数ペア:

[(1, 201908780), (2, 100954390), (4, 50477195), (5, 40381756), (10, 20190878), (20, 10095439), (61, 3309980), (122, 1654990), (244, 827495), (305, 661996), (359, 562420), (461, 437980), (610, 330998), (718, 281210), (922, 218990), (1220, 165499), (1436, 140605), (1795, 112484), (1844, 109495), (2305, 87596), (3590, 56242), (4610, 43798), (7180, 28121), (9220, 21899)]