20880816

素因数分解:

$2^4\times 3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{557}}^1$

素因数の和:650

約数の個数: 80

約数和(自身を含む): 59781888

約数和(自身を除く): 38901072

約数列:

[1, 2, 3, 4, 6, 8, 11, 12, 16, 22, 24, 33, 44, 48, 66, 71, 88, 132, 142, 176, 213, 264, 284, 426, 528, 557, 568, 781, 852, 1114, 1136, 1562, 1671, 1704, 2228, 2343, 3124, 3342, 3408, 4456, 4686, 6127, 6248, 6684, 8912, 9372, 12254, 12496, 13368, 18381, 18744, 24508, 26736, 36762, 37488, 39547, 49016, 73524, 79094, 98032, 118641, 147048, 158188, 237282, 294096, 316376, 435017, 474564, 632752, 870034, 949128, 1305051, 1740068, 1898256, 2610102, 3480136, 5220204, 6960272, 10440408, 20880816]

約数ペア:

[(1, 20880816), (2, 10440408), (3, 6960272), (4, 5220204), (6, 3480136), (8, 2610102), (11, 1898256), (12, 1740068), (16, 1305051), (22, 949128), (24, 870034), (33, 632752), (44, 474564), (48, 435017), (66, 316376), (71, 294096), (88, 237282), (132, 158188), (142, 147048), (176, 118641), (213, 98032), (264, 79094), (284, 73524), (426, 49016), (528, 39547), (557, 37488), (568, 36762), (781, 26736), (852, 24508), (1114, 18744), (1136, 18381), (1562, 13368), (1671, 12496), (1704, 12254), (2228, 9372), (2343, 8912), (3124, 6684), (3342, 6248), (3408, 6127), (4456, 4686)]