21057218

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1$

素因数の和:171

約数の個数: 64

約数和(自身を含む): 41368320

約数和(自身を除く): 20311102

約数列:

[1, 2, 7, 13, 14, 26, 37, 53, 59, 74, 91, 106, 118, 182, 259, 371, 413, 481, 518, 689, 742, 767, 826, 962, 1378, 1534, 1961, 2183, 3127, 3367, 3922, 4366, 4823, 5369, 6254, 6734, 9646, 10738, 13727, 15281, 21889, 25493, 27454, 28379, 30562, 40651, 43778, 50986, 56758, 81302, 115699, 178451, 198653, 231398, 284557, 356902, 397306, 569114, 809893, 1504087, 1619786, 3008174, 10528609, 21057218]

約数ペア:

[(1, 21057218), (2, 10528609), (7, 3008174), (13, 1619786), (14, 1504087), (26, 809893), (37, 569114), (53, 397306), (59, 356902), (74, 284557), (91, 231398), (106, 198653), (118, 178451), (182, 115699), (259, 81302), (371, 56758), (413, 50986), (481, 43778), (518, 40651), (689, 30562), (742, 28379), (767, 27454), (826, 25493), (962, 21889), (1378, 15281), (1534, 13727), (1961, 10738), (2183, 9646), (3127, 6734), (3367, 6254), (3922, 5369), (4366, 4823)]