20684440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2383}}^1$

素因数の和:2432

約数の個数: 64

約数和(自身を含む): 54927360

約数和(自身を除く): 34242920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2383, 4340, 4766, 8680, 9532, 11915, 16681, 19064, 23830, 33362, 47660, 66724, 73873, 83405, 95320, 133448, 147746, 166810, 295492, 333620, 369365, 517111, 590984, 667240, 738730, 1034222, 1477460, 2068444, 2585555, 2954920, 4136888, 5171110, 10342220, 20684440]

約数ペア:

[(1, 20684440), (2, 10342220), (4, 5171110), (5, 4136888), (7, 2954920), (8, 2585555), (10, 2068444), (14, 1477460), (20, 1034222), (28, 738730), (31, 667240), (35, 590984), (40, 517111), (56, 369365), (62, 333620), (70, 295492), (124, 166810), (140, 147746), (155, 133448), (217, 95320), (248, 83405), (280, 73873), (310, 66724), (434, 47660), (620, 33362), (868, 23830), (1085, 19064), (1240, 16681), (1736, 11915), (2170, 9532), (2383, 8680), (4340, 4766)]