21275505

素因数分解:

$3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6659}}^1$

素因数の和:6741

約数の個数: 24

約数和(自身を含む): 37402560

約数和(自身を除く): 16127055

約数列:

[1, 3, 5, 9, 15, 45, 71, 213, 355, 639, 1065, 3195, 6659, 19977, 33295, 59931, 99885, 299655, 472789, 1418367, 2363945, 4255101, 7091835, 21275505]

約数ペア:

[(1, 21275505), (3, 7091835), (5, 4255101), (9, 2363945), (15, 1418367), (45, 472789), (71, 299655), (213, 99885), (355, 59931), (639, 33295), (1065, 19977), (3195, 6659)]