18979480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1$

素因数の和:173

約数の個数: 128

約数和(自身を含む): 51710400

約数和(自身を除く): 32730920

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 19, 20, 26, 34, 38, 40, 52, 65, 68, 76, 85, 95, 104, 113, 130, 136, 152, 170, 190, 221, 226, 247, 260, 323, 340, 380, 442, 452, 494, 520, 565, 646, 680, 760, 884, 904, 988, 1105, 1130, 1235, 1292, 1469, 1615, 1768, 1921, 1976, 2147, 2210, 2260, 2470, 2584, 2938, 3230, 3842, 4199, 4294, 4420, 4520, 4940, 5876, 6460, 7345, 7684, 8398, 8588, 8840, 9605, 9880, 10735, 11752, 12920, 14690, 15368, 16796, 17176, 19210, 20995, 21470, 24973, 27911, 29380, 33592, 36499, 38420, 41990, 42940, 49946, 55822, 58760, 72998, 76840, 83980, 85880, 99892, 111644, 124865, 139555, 145996, 167960, 182495, 199784, 223288, 249730, 279110, 291992, 364990, 474487, 499460, 558220, 729980, 948974, 998920, 1116440, 1459960, 1897948, 2372435, 3795896, 4744870, 9489740, 18979480]

約数ペア:

[(1, 18979480), (2, 9489740), (4, 4744870), (5, 3795896), (8, 2372435), (10, 1897948), (13, 1459960), (17, 1116440), (19, 998920), (20, 948974), (26, 729980), (34, 558220), (38, 499460), (40, 474487), (52, 364990), (65, 291992), (68, 279110), (76, 249730), (85, 223288), (95, 199784), (104, 182495), (113, 167960), (130, 145996), (136, 139555), (152, 124865), (170, 111644), (190, 99892), (221, 85880), (226, 83980), (247, 76840), (260, 72998), (323, 58760), (340, 55822), (380, 49946), (442, 42940), (452, 41990), (494, 38420), (520, 36499), (565, 33592), (646, 29380), (680, 27911), (760, 24973), (884, 21470), (904, 20995), (988, 19210), (1105, 17176), (1130, 16796), (1235, 15368), (1292, 14690), (1469, 12920), (1615, 11752), (1768, 10735), (1921, 9880), (1976, 9605), (2147, 8840), (2210, 8588), (2260, 8398), (2470, 7684), (2584, 7345), (2938, 6460), (3230, 5876), (3842, 4940), (4199, 4520), (4294, 4420)]