290339960

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{21929}}^1$

素因数の和:22271

約数の個数: 32

約数和(自身を含む): 655268400

約数和(自身を除く): 364928440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1655, 2648, 3310, 6620, 13240, 21929, 43858, 87716, 109645, 175432, 219290, 438580, 877160, 7258499, 14516998, 29033996, 36292495, 58067992, 72584990, 145169980, 290339960]

約数ペア:

[(1, 290339960), (2, 145169980), (4, 72584990), (5, 58067992), (8, 36292495), (10, 29033996), (20, 14516998), (40, 7258499), (331, 877160), (662, 438580), (1324, 219290), (1655, 175432), (2648, 109645), (3310, 87716), (6620, 43858), (13240, 21929)]