21556690

素因数分解:

$2^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{457}}^1$

素因数の和:606

約数の個数: 32

約数和(自身を含む): 40065840

約数和(自身を除く): 18509150

約数列:

[1, 2, 5, 10, 53, 89, 106, 178, 265, 445, 457, 530, 890, 914, 2285, 4570, 4717, 9434, 23585, 24221, 40673, 47170, 48442, 81346, 121105, 203365, 242210, 406730, 2155669, 4311338, 10778345, 21556690]

約数ペア:

[(1, 21556690), (2, 10778345), (5, 4311338), (10, 2155669), (53, 406730), (89, 242210), (106, 203365), (178, 121105), (265, 81346), (445, 48442), (457, 47170), (530, 40673), (890, 24221), (914, 23585), (2285, 9434), (4570, 4717)]