21212512

素因数分解:

$2^5\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:419

約数の個数: 48

約数和(自身を含む): 44452800

約数和(自身を除く): 23240288

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 76, 139, 152, 251, 278, 304, 502, 556, 608, 1004, 1112, 2008, 2224, 2641, 4016, 4448, 4769, 5282, 8032, 9538, 10564, 19076, 21128, 34889, 38152, 42256, 69778, 76304, 84512, 139556, 152608, 279112, 558224, 662891, 1116448, 1325782, 2651564, 5303128, 10606256, 21212512]

約数ペア:

[(1, 21212512), (2, 10606256), (4, 5303128), (8, 2651564), (16, 1325782), (19, 1116448), (32, 662891), (38, 558224), (76, 279112), (139, 152608), (152, 139556), (251, 84512), (278, 76304), (304, 69778), (502, 42256), (556, 38152), (608, 34889), (1004, 21128), (1112, 19076), (2008, 10564), (2224, 9538), (2641, 8032), (4016, 5282), (4448, 4769)]