39720920

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{311}}^1$

素因数の和:456

約数の個数: 64

約数和(自身を含む): 93450240

約数和(自身を除く): 53729320

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 103, 124, 155, 206, 248, 310, 311, 412, 515, 620, 622, 824, 1030, 1240, 1244, 1555, 2060, 2488, 3110, 3193, 4120, 6220, 6386, 9641, 12440, 12772, 15965, 19282, 25544, 31930, 32033, 38564, 48205, 63860, 64066, 77128, 96410, 127720, 128132, 160165, 192820, 256264, 320330, 385640, 640660, 993023, 1281320, 1986046, 3972092, 4965115, 7944184, 9930230, 19860460, 39720920]

約数ペア:

[(1, 39720920), (2, 19860460), (4, 9930230), (5, 7944184), (8, 4965115), (10, 3972092), (20, 1986046), (31, 1281320), (40, 993023), (62, 640660), (103, 385640), (124, 320330), (155, 256264), (206, 192820), (248, 160165), (310, 128132), (311, 127720), (412, 96410), (515, 77128), (620, 64066), (622, 63860), (824, 48205), (1030, 38564), (1240, 32033), (1244, 31930), (1555, 25544), (2060, 19282), (2488, 15965), (3110, 12772), (3193, 12440), (4120, 9641), (6220, 6386)]