515840

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1$

素因数の和:65

約数の個数: 72

約数和(自身を含む): 1373568

約数和(自身を除く): 857728

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, 256, 260, 310, 320, 403, 416, 496, 520, 620, 640, 806, 832, 992, 1040, 1240, 1280, 1612, 1664, 1984, 2015, 2080, 2480, 3224, 3328, 3968, 4030, 4160, 4960, 6448, 7936, 8060, 8320, 9920, 12896, 16120, 16640, 19840, 25792, 32240, 39680, 51584, 64480, 103168, 128960, 257920, 515840]

約数ペア:

[(1, 515840), (2, 257920), (4, 128960), (5, 103168), (8, 64480), (10, 51584), (13, 39680), (16, 32240), (20, 25792), (26, 19840), (31, 16640), (32, 16120), (40, 12896), (52, 9920), (62, 8320), (64, 8060), (65, 7936), (80, 6448), (104, 4960), (124, 4160), (128, 4030), (130, 3968), (155, 3328), (160, 3224), (208, 2480), (248, 2080), (256, 2015), (260, 1984), (310, 1664), (320, 1612), (403, 1280), (416, 1240), (496, 1040), (520, 992), (620, 832), (640, 806)]