21000751876

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{660983}}^1$

素因数の和:661060

約数の個数: 36

約数和(自身を含む): 40642584192

約数和(自身を除く): 19641832316

約数列:

[1, 2, 4, 13, 26, 47, 52, 94, 169, 188, 338, 611, 676, 1222, 2444, 7943, 15886, 31772, 660983, 1321966, 2643932, 8592779, 17185558, 31066201, 34371116, 62132402, 111706127, 124264804, 223412254, 403860613, 446824508, 807721226, 1615442452, 5250187969, 10500375938, 21000751876]

約数ペア:

[(1, 21000751876), (2, 10500375938), (4, 5250187969), (13, 1615442452), (26, 807721226), (47, 446824508), (52, 403860613), (94, 223412254), (169, 124264804), (188, 111706127), (338, 62132402), (611, 34371116), (676, 31066201), (1222, 17185558), (2444, 8592779), (7943, 2643932), (15886, 1321966), (31772, 660983)]