405080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1$

素因数の和:84

約数の個数: 64

約数和(自身を含む): 1058400

約数和(自身を除く): 653320

約数列:

[1, 2, 4, 5, 8, 10, 13, 19, 20, 26, 38, 40, 41, 52, 65, 76, 82, 95, 104, 130, 152, 164, 190, 205, 247, 260, 328, 380, 410, 494, 520, 533, 760, 779, 820, 988, 1066, 1235, 1558, 1640, 1976, 2132, 2470, 2665, 3116, 3895, 4264, 4940, 5330, 6232, 7790, 9880, 10127, 10660, 15580, 20254, 21320, 31160, 40508, 50635, 81016, 101270, 202540, 405080]

約数ペア:

[(1, 405080), (2, 202540), (4, 101270), (5, 81016), (8, 50635), (10, 40508), (13, 31160), (19, 21320), (20, 20254), (26, 15580), (38, 10660), (40, 10127), (41, 9880), (52, 7790), (65, 6232), (76, 5330), (82, 4940), (95, 4264), (104, 3895), (130, 3116), (152, 2665), (164, 2470), (190, 2132), (205, 1976), (247, 1640), (260, 1558), (328, 1235), (380, 1066), (410, 988), (494, 820), (520, 779), (533, 760)]