19747640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1213}}^1$

素因数の和:1272

約数の個数: 64

約数和(自身を含む): 49822560

約数和(自身を除く): 30074920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 37, 40, 44, 55, 74, 88, 110, 148, 185, 220, 296, 370, 407, 440, 740, 814, 1213, 1480, 1628, 2035, 2426, 3256, 4070, 4852, 6065, 8140, 9704, 12130, 13343, 16280, 24260, 26686, 44881, 48520, 53372, 66715, 89762, 106744, 133430, 179524, 224405, 266860, 359048, 448810, 493691, 533720, 897620, 987382, 1795240, 1974764, 2468455, 3949528, 4936910, 9873820, 19747640]

約数ペア:

[(1, 19747640), (2, 9873820), (4, 4936910), (5, 3949528), (8, 2468455), (10, 1974764), (11, 1795240), (20, 987382), (22, 897620), (37, 533720), (40, 493691), (44, 448810), (55, 359048), (74, 266860), (88, 224405), (110, 179524), (148, 133430), (185, 106744), (220, 89762), (296, 66715), (370, 53372), (407, 48520), (440, 44881), (740, 26686), (814, 24260), (1213, 16280), (1480, 13343), (1628, 12130), (2035, 9704), (2426, 8140), (3256, 6065), (4070, 4852)]