20120269840

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{289417}}^1$

素因数の和:289520

約数の個数: 80

約数和(自身を含む): 51678478080

約数和(自身を除く): 31558208240

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 79, 80, 88, 110, 158, 176, 220, 316, 395, 440, 632, 790, 869, 880, 1264, 1580, 1738, 3160, 3476, 4345, 6320, 6952, 8690, 13904, 17380, 34760, 69520, 289417, 578834, 1157668, 1447085, 2315336, 2894170, 3183587, 4630672, 5788340, 6367174, 11576680, 12734348, 15917935, 22863943, 23153360, 25468696, 31835870, 45727886, 50937392, 63671740, 91455772, 114319715, 127343480, 182911544, 228639430, 251503373, 254686960, 365823088, 457278860, 503006746, 914557720, 1006013492, 1257516865, 1829115440, 2012026984, 2515033730, 4024053968, 5030067460, 10060134920, 20120269840]

約数ペア:

[(1, 20120269840), (2, 10060134920), (4, 5030067460), (5, 4024053968), (8, 2515033730), (10, 2012026984), (11, 1829115440), (16, 1257516865), (20, 1006013492), (22, 914557720), (40, 503006746), (44, 457278860), (55, 365823088), (79, 254686960), (80, 251503373), (88, 228639430), (110, 182911544), (158, 127343480), (176, 114319715), (220, 91455772), (316, 63671740), (395, 50937392), (440, 45727886), (632, 31835870), (790, 25468696), (869, 23153360), (880, 22863943), (1264, 15917935), (1580, 12734348), (1738, 11576680), (3160, 6367174), (3476, 5788340), (4345, 4630672), (6320, 3183587), (6952, 2894170), (8690, 2315336), (13904, 1447085), (17380, 1157668), (34760, 578834), (69520, 289417)]