81868520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{641}}^1$

素因数の和:786

約数の個数: 64

約数和(自身を含む): 192291840

約数和(自身を除く): 110423320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 103, 124, 155, 206, 248, 310, 412, 515, 620, 641, 824, 1030, 1240, 1282, 2060, 2564, 3193, 3205, 4120, 5128, 6386, 6410, 12772, 12820, 15965, 19871, 25544, 25640, 31930, 39742, 63860, 66023, 79484, 99355, 127720, 132046, 158968, 198710, 264092, 330115, 397420, 528184, 660230, 794840, 1320460, 2046713, 2640920, 4093426, 8186852, 10233565, 16373704, 20467130, 40934260, 81868520]

約数ペア:

[(1, 81868520), (2, 40934260), (4, 20467130), (5, 16373704), (8, 10233565), (10, 8186852), (20, 4093426), (31, 2640920), (40, 2046713), (62, 1320460), (103, 794840), (124, 660230), (155, 528184), (206, 397420), (248, 330115), (310, 264092), (412, 198710), (515, 158968), (620, 132046), (641, 127720), (824, 99355), (1030, 79484), (1240, 66023), (1282, 63860), (2060, 39742), (2564, 31930), (3193, 25640), (3205, 25544), (4120, 19871), (5128, 15965), (6386, 12820), (6410, 12772)]