20701720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{971}}^1$

素因数の和:1036

約数の個数: 64

約数和(自身を含む): 51438240

約数和(自身を除く): 30736520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 41, 52, 65, 82, 104, 130, 164, 205, 260, 328, 410, 520, 533, 820, 971, 1066, 1640, 1942, 2132, 2665, 3884, 4264, 4855, 5330, 7768, 9710, 10660, 12623, 19420, 21320, 25246, 38840, 39811, 50492, 63115, 79622, 100984, 126230, 159244, 199055, 252460, 318488, 398110, 504920, 517543, 796220, 1035086, 1592440, 2070172, 2587715, 4140344, 5175430, 10350860, 20701720]

約数ペア:

[(1, 20701720), (2, 10350860), (4, 5175430), (5, 4140344), (8, 2587715), (10, 2070172), (13, 1592440), (20, 1035086), (26, 796220), (40, 517543), (41, 504920), (52, 398110), (65, 318488), (82, 252460), (104, 199055), (130, 159244), (164, 126230), (205, 100984), (260, 79622), (328, 63115), (410, 50492), (520, 39811), (533, 38840), (820, 25246), (971, 21320), (1066, 19420), (1640, 12623), (1942, 10660), (2132, 9710), (2665, 7768), (3884, 5330), (4264, 4855)]