21022924

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{137}}^1\times {\mathrm{227}}^1$

素因数の和:394

約数の個数: 36

約数和(自身を含む): 40305384

約数和(自身を除く): 19282460

約数列:

[1, 2, 4, 13, 26, 52, 137, 169, 227, 274, 338, 454, 548, 676, 908, 1781, 2951, 3562, 5902, 7124, 11804, 23153, 31099, 38363, 46306, 62198, 76726, 92612, 124396, 153452, 404287, 808574, 1617148, 5255731, 10511462, 21022924]

約数ペア:

[(1, 21022924), (2, 10511462), (4, 5255731), (13, 1617148), (26, 808574), (52, 404287), (137, 153452), (169, 124396), (227, 92612), (274, 76726), (338, 62198), (454, 46306), (548, 38363), (676, 31099), (908, 23153), (1781, 11804), (2951, 7124), (3562, 5902)]