20663020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{3989}}^1$

素因数の和:4042

約数の個数: 48

約数和(自身を含む): 50944320

約数和(自身を除く): 30281300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 3989, 5180, 7978, 15956, 19945, 27923, 39890, 55846, 79780, 111692, 139615, 147593, 279230, 295186, 558460, 590372, 737965, 1033151, 1475930, 2066302, 2951860, 4132604, 5165755, 10331510, 20663020]

約数ペア:

[(1, 20663020), (2, 10331510), (4, 5165755), (5, 4132604), (7, 2951860), (10, 2066302), (14, 1475930), (20, 1033151), (28, 737965), (35, 590372), (37, 558460), (70, 295186), (74, 279230), (140, 147593), (148, 139615), (185, 111692), (259, 79780), (370, 55846), (518, 39890), (740, 27923), (1036, 19945), (1295, 15956), (2590, 7978), (3989, 5180)]