21175790

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{823}}^1$

素因数の和:944

約数の個数: 32

約数和(自身を含む): 39868416

約数和(自身を除く): 18692626

約数列:

[1, 2, 5, 10, 31, 62, 83, 155, 166, 310, 415, 823, 830, 1646, 2573, 4115, 5146, 8230, 12865, 25513, 25730, 51026, 68309, 127565, 136618, 255130, 341545, 683090, 2117579, 4235158, 10587895, 21175790]

約数ペア:

[(1, 21175790), (2, 10587895), (5, 4235158), (10, 2117579), (31, 683090), (62, 341545), (83, 255130), (155, 136618), (166, 127565), (310, 68309), (415, 51026), (823, 25730), (830, 25513), (1646, 12865), (2573, 8230), (4115, 5146)]