21720566

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{401}}^1$

素因数の和:536

約数の個数: 32

約数和(自身を含む): 38553408

約数和(自身を除く): 16832842

約数列:

[1, 2, 7, 14, 53, 73, 106, 146, 371, 401, 511, 742, 802, 1022, 2807, 3869, 5614, 7738, 21253, 27083, 29273, 42506, 54166, 58546, 148771, 204911, 297542, 409822, 1551469, 3102938, 10860283, 21720566]

約数ペア:

[(1, 21720566), (2, 10860283), (7, 3102938), (14, 1551469), (53, 409822), (73, 297542), (106, 204911), (146, 148771), (371, 58546), (401, 54166), (511, 42506), (742, 29273), (802, 27083), (1022, 21253), (2807, 7738), (3869, 5614)]