21400688

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{101}}^1$

素因数の和:186

約数の個数: 80

約数和(自身を含む): 47809440

約数和(自身を除く): 26408752

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 41, 68, 76, 82, 101, 136, 152, 164, 202, 272, 304, 323, 328, 404, 646, 656, 697, 779, 808, 1292, 1394, 1558, 1616, 1717, 1919, 2584, 2788, 3116, 3434, 3838, 4141, 5168, 5576, 6232, 6868, 7676, 8282, 11152, 12464, 13243, 13736, 15352, 16564, 26486, 27472, 30704, 32623, 33128, 52972, 65246, 66256, 70397, 78679, 105944, 130492, 140794, 157358, 211888, 260984, 281588, 314716, 521968, 563176, 629432, 1126352, 1258864, 1337543, 2675086, 5350172, 10700344, 21400688]

約数ペア:

[(1, 21400688), (2, 10700344), (4, 5350172), (8, 2675086), (16, 1337543), (17, 1258864), (19, 1126352), (34, 629432), (38, 563176), (41, 521968), (68, 314716), (76, 281588), (82, 260984), (101, 211888), (136, 157358), (152, 140794), (164, 130492), (202, 105944), (272, 78679), (304, 70397), (323, 66256), (328, 65246), (404, 52972), (646, 33128), (656, 32623), (697, 30704), (779, 27472), (808, 26486), (1292, 16564), (1394, 15352), (1558, 13736), (1616, 13243), (1717, 12464), (1919, 11152), (2584, 8282), (2788, 7676), (3116, 6868), (3434, 6232), (3838, 5576), (4141, 5168)]