128440

素因数分解:

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

素因数の和:56

約数の個数: 48

約数和(自身を含む): 329400

約数和(自身を除く): 200960

約数列:

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

約数ペア:

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