18987640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{3989}}^1$

素因数の和:4024

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 32722760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 40, 56, 68, 70, 85, 119, 136, 140, 170, 238, 280, 340, 476, 595, 680, 952, 1190, 2380, 3989, 4760, 7978, 15956, 19945, 27923, 31912, 39890, 55846, 67813, 79780, 111692, 135626, 139615, 159560, 223384, 271252, 279230, 339065, 474691, 542504, 558460, 678130, 949382, 1116920, 1356260, 1898764, 2373455, 2712520, 3797528, 4746910, 9493820, 18987640]

約数ペア:

[(1, 18987640), (2, 9493820), (4, 4746910), (5, 3797528), (7, 2712520), (8, 2373455), (10, 1898764), (14, 1356260), (17, 1116920), (20, 949382), (28, 678130), (34, 558460), (35, 542504), (40, 474691), (56, 339065), (68, 279230), (70, 271252), (85, 223384), (119, 159560), (136, 139615), (140, 135626), (170, 111692), (238, 79780), (280, 67813), (340, 55846), (476, 39890), (595, 31912), (680, 27923), (952, 19945), (1190, 15956), (2380, 7978), (3989, 4760)]