21781552

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:230

約数の個数: 80

約数和(自身を含む): 49371840

約数和(自身を除く): 27590288

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 29, 46, 52, 58, 92, 104, 116, 157, 184, 208, 232, 299, 314, 368, 377, 464, 598, 628, 667, 754, 1196, 1256, 1334, 1508, 2041, 2392, 2512, 2668, 3016, 3611, 4082, 4553, 4784, 5336, 6032, 7222, 8164, 8671, 9106, 10672, 14444, 16328, 17342, 18212, 28888, 32656, 34684, 36424, 46943, 57776, 59189, 69368, 72848, 93886, 104719, 118378, 138736, 187772, 209438, 236756, 375544, 418876, 473512, 751088, 837752, 947024, 1361347, 1675504, 2722694, 5445388, 10890776, 21781552]

約数ペア:

[(1, 21781552), (2, 10890776), (4, 5445388), (8, 2722694), (13, 1675504), (16, 1361347), (23, 947024), (26, 837752), (29, 751088), (46, 473512), (52, 418876), (58, 375544), (92, 236756), (104, 209438), (116, 187772), (157, 138736), (184, 118378), (208, 104719), (232, 93886), (299, 72848), (314, 69368), (368, 59189), (377, 57776), (464, 46943), (598, 36424), (628, 34684), (667, 32656), (754, 28888), (1196, 18212), (1256, 17342), (1334, 16328), (1508, 14444), (2041, 10672), (2392, 9106), (2512, 8671), (2668, 8164), (3016, 7222), (3611, 6032), (4082, 5336), (4553, 4784)]