21771975

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^2\times {\mathrm{157}}^1$

素因数の和:256

約数の個数: 36

約数和(自身を含む): 37087656

約数和(自身を除く): 15315681

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 157, 215, 471, 645, 785, 1075, 1849, 2355, 3225, 3925, 5547, 6751, 9245, 11775, 20253, 27735, 33755, 46225, 101265, 138675, 168775, 290293, 506325, 870879, 1451465, 4354395, 7257325, 21771975]

約数ペア:

[(1, 21771975), (3, 7257325), (5, 4354395), (15, 1451465), (25, 870879), (43, 506325), (75, 290293), (129, 168775), (157, 138675), (215, 101265), (471, 46225), (645, 33755), (785, 27735), (1075, 20253), (1849, 11775), (2355, 9245), (3225, 6751), (3925, 5547)]