311998520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{190243}}^1$

素因数の和:190295

約数の個数: 32

約数和(自身を含む): 719122320

約数和(自身を除く): 407123800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 190243, 380486, 760972, 951215, 1521944, 1902430, 3804860, 7609720, 7799963, 15599926, 31199852, 38999815, 62399704, 77999630, 155999260, 311998520]

約数ペア:

[(1, 311998520), (2, 155999260), (4, 77999630), (5, 62399704), (8, 38999815), (10, 31199852), (20, 15599926), (40, 7799963), (41, 7609720), (82, 3804860), (164, 1902430), (205, 1521944), (328, 951215), (410, 760972), (820, 380486), (1640, 190243)]