21659260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2179}}^1$

素因数の和:2266

約数の個数: 48

約数和(自身を含む): 52738560

約数和(自身を除く): 31079300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2179, 2485, 4358, 4970, 8716, 9940, 10895, 15253, 21790, 30506, 43580, 61012, 76265, 152530, 154709, 305060, 309418, 618836, 773545, 1082963, 1547090, 2165926, 3094180, 4331852, 5414815, 10829630, 21659260]

約数ペア:

[(1, 21659260), (2, 10829630), (4, 5414815), (5, 4331852), (7, 3094180), (10, 2165926), (14, 1547090), (20, 1082963), (28, 773545), (35, 618836), (70, 309418), (71, 305060), (140, 154709), (142, 152530), (284, 76265), (355, 61012), (497, 43580), (710, 30506), (994, 21790), (1420, 15253), (1988, 10895), (2179, 9940), (2485, 8716), (4358, 4970)]