18956840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{857}}^1$

素因数の和:954

約数の個数: 64

約数和(自身を含む): 49420800

約数和(自身を除く): 30463960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 857, 1106, 1580, 1714, 2212, 2765, 3160, 3428, 4285, 4424, 5530, 5999, 6856, 8570, 11060, 11998, 17140, 22120, 23996, 29995, 34280, 47992, 59990, 67703, 119980, 135406, 239960, 270812, 338515, 473921, 541624, 677030, 947842, 1354060, 1895684, 2369605, 2708120, 3791368, 4739210, 9478420, 18956840]

約数ペア:

[(1, 18956840), (2, 9478420), (4, 4739210), (5, 3791368), (7, 2708120), (8, 2369605), (10, 1895684), (14, 1354060), (20, 947842), (28, 677030), (35, 541624), (40, 473921), (56, 338515), (70, 270812), (79, 239960), (140, 135406), (158, 119980), (280, 67703), (316, 59990), (395, 47992), (553, 34280), (632, 29995), (790, 23996), (857, 22120), (1106, 17140), (1580, 11998), (1714, 11060), (2212, 8570), (2765, 6856), (3160, 5999), (3428, 5530), (4285, 4424)]