21000496990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{859}}^1\times {\mathrm{2039}}^1$

素因数の和:3025

約数の個数: 64

約数和(自身を含む): 41684544000

約数和(自身を除く): 20684047010

約数列:

[1, 2, 5, 10, 11, 22, 55, 109, 110, 218, 545, 859, 1090, 1199, 1718, 2039, 2398, 4078, 4295, 5995, 8590, 9449, 10195, 11990, 18898, 20390, 22429, 44858, 47245, 93631, 94490, 112145, 187262, 222251, 224290, 444502, 468155, 936310, 1029941, 1111255, 1751501, 2059882, 2222510, 2444761, 3503002, 4889522, 5149705, 8757505, 10299410, 12223805, 17515010, 19266511, 24447610, 38533022, 96332555, 190913609, 192665110, 381827218, 954568045, 1909136090, 2100049699, 4200099398, 10500248495, 21000496990]

約数ペア:

[(1, 21000496990), (2, 10500248495), (5, 4200099398), (10, 2100049699), (11, 1909136090), (22, 954568045), (55, 381827218), (109, 192665110), (110, 190913609), (218, 96332555), (545, 38533022), (859, 24447610), (1090, 19266511), (1199, 17515010), (1718, 12223805), (2039, 10299410), (2398, 8757505), (4078, 5149705), (4295, 4889522), (5995, 3503002), (8590, 2444761), (9449, 2222510), (10195, 2059882), (11990, 1751501), (18898, 1111255), (20390, 1029941), (22429, 936310), (44858, 468155), (47245, 444502), (93631, 224290), (94490, 222251), (112145, 187262)]