256880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1$

素因数の和:58

約数の個数: 60

約数和(自身を含む): 680760

約数和(自身を除く): 423880

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 169, 190, 208, 247, 260, 304, 338, 380, 494, 520, 676, 760, 845, 988, 1040, 1235, 1352, 1520, 1690, 1976, 2470, 2704, 3211, 3380, 3952, 4940, 6422, 6760, 9880, 12844, 13520, 16055, 19760, 25688, 32110, 51376, 64220, 128440, 256880]

約数ペア:

[(1, 256880), (2, 128440), (4, 64220), (5, 51376), (8, 32110), (10, 25688), (13, 19760), (16, 16055), (19, 13520), (20, 12844), (26, 9880), (38, 6760), (40, 6422), (52, 4940), (65, 3952), (76, 3380), (80, 3211), (95, 2704), (104, 2470), (130, 1976), (152, 1690), (169, 1520), (190, 1352), (208, 1235), (247, 1040), (260, 988), (304, 845), (338, 760), (380, 676), (494, 520)]