21000955948

素因数分解:

$2^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1439}}^1\times {\mathrm{14087}}^1$

素因数の和:15574

約数の個数: 48

約数和(自身を含む): 43170140160

約数和(自身を除く): 22169184212

約数列:

[1, 2, 4, 7, 14, 28, 37, 74, 148, 259, 518, 1036, 1439, 2878, 5756, 10073, 14087, 20146, 28174, 40292, 53243, 56348, 98609, 106486, 197218, 212972, 372701, 394436, 521219, 745402, 1042438, 1490804, 2084876, 3648533, 7297066, 14594132, 20271193, 40542386, 81084772, 141898351, 283796702, 567593404, 750034141, 1500068282, 3000136564, 5250238987, 10500477974, 21000955948]

約数ペア:

[(1, 21000955948), (2, 10500477974), (4, 5250238987), (7, 3000136564), (14, 1500068282), (28, 750034141), (37, 567593404), (74, 283796702), (148, 141898351), (259, 81084772), (518, 40542386), (1036, 20271193), (1439, 14594132), (2878, 7297066), (5756, 3648533), (10073, 2084876), (14087, 1490804), (20146, 1042438), (28174, 745402), (40292, 521219), (53243, 394436), (56348, 372701), (98609, 212972), (106486, 197218)]