21750280

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6883}}^1$

素因数の和:6973

約数の個数: 32

約数和(自身を含む): 49564800

約数和(自身を除く): 27814520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6883, 13766, 27532, 34415, 55064, 68830, 137660, 275320, 543757, 1087514, 2175028, 2718785, 4350056, 5437570, 10875140, 21750280]

約数ペア:

[(1, 21750280), (2, 10875140), (4, 5437570), (5, 4350056), (8, 2718785), (10, 2175028), (20, 1087514), (40, 543757), (79, 275320), (158, 137660), (316, 68830), (395, 55064), (632, 34415), (790, 27532), (1580, 13766), (3160, 6883)]