20954440

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{683}}^1$

素因数の和:766

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 30755960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 683, 767, 1180, 1366, 1534, 2360, 2732, 3068, 3415, 3835, 5464, 6136, 6830, 7670, 8879, 13660, 15340, 17758, 27320, 30680, 35516, 40297, 44395, 71032, 80594, 88790, 161188, 177580, 201485, 322376, 355160, 402970, 523861, 805940, 1047722, 1611880, 2095444, 2619305, 4190888, 5238610, 10477220, 20954440]

約数ペア:

[(1, 20954440), (2, 10477220), (4, 5238610), (5, 4190888), (8, 2619305), (10, 2095444), (13, 1611880), (20, 1047722), (26, 805940), (40, 523861), (52, 402970), (59, 355160), (65, 322376), (104, 201485), (118, 177580), (130, 161188), (236, 88790), (260, 80594), (295, 71032), (472, 44395), (520, 40297), (590, 35516), (683, 30680), (767, 27320), (1180, 17758), (1366, 15340), (1534, 13660), (2360, 8879), (2732, 7670), (3068, 6830), (3415, 6136), (3835, 5464)]