20531920

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{487}}^1$

素因数の和:548

約数の個数: 80

約数和(自身を含む): 52282368

約数和(自身を除く): 31750448

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 31, 34, 40, 62, 68, 80, 85, 124, 136, 155, 170, 248, 272, 310, 340, 487, 496, 527, 620, 680, 974, 1054, 1240, 1360, 1948, 2108, 2435, 2480, 2635, 3896, 4216, 4870, 5270, 7792, 8279, 8432, 9740, 10540, 15097, 16558, 19480, 21080, 30194, 33116, 38960, 41395, 42160, 60388, 66232, 75485, 82790, 120776, 132464, 150970, 165580, 241552, 256649, 301940, 331160, 513298, 603880, 662320, 1026596, 1207760, 1283245, 2053192, 2566490, 4106384, 5132980, 10265960, 20531920]

約数ペア:

[(1, 20531920), (2, 10265960), (4, 5132980), (5, 4106384), (8, 2566490), (10, 2053192), (16, 1283245), (17, 1207760), (20, 1026596), (31, 662320), (34, 603880), (40, 513298), (62, 331160), (68, 301940), (80, 256649), (85, 241552), (124, 165580), (136, 150970), (155, 132464), (170, 120776), (248, 82790), (272, 75485), (310, 66232), (340, 60388), (487, 42160), (496, 41395), (527, 38960), (620, 33116), (680, 30194), (974, 21080), (1054, 19480), (1240, 16558), (1360, 15097), (1948, 10540), (2108, 9740), (2435, 8432), (2480, 8279), (2635, 7792), (3896, 5270), (4216, 4870)]