257920

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:63

約数の個数: 64

約数和(自身を含む): 685440

約数和(自身を除く): 427520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 128, 130, 155, 160, 208, 248, 260, 310, 320, 403, 416, 496, 520, 620, 640, 806, 832, 992, 1040, 1240, 1612, 1664, 1984, 2015, 2080, 2480, 3224, 3968, 4030, 4160, 4960, 6448, 8060, 8320, 9920, 12896, 16120, 19840, 25792, 32240, 51584, 64480, 128960, 257920]

約数ペア:

[(1, 257920), (2, 128960), (4, 64480), (5, 51584), (8, 32240), (10, 25792), (13, 19840), (16, 16120), (20, 12896), (26, 9920), (31, 8320), (32, 8060), (40, 6448), (52, 4960), (62, 4160), (64, 4030), (65, 3968), (80, 3224), (104, 2480), (124, 2080), (128, 2015), (130, 1984), (155, 1664), (160, 1612), (208, 1240), (248, 1040), (260, 992), (310, 832), (320, 806), (403, 640), (416, 620), (496, 520)]