21057015

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28649}}^1$

素因数の和:28671

約数の個数: 24

約数和(自身を含む): 39193200

約数和(自身を除く): 18136185

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28649, 85947, 143245, 200543, 429735, 601629, 1002715, 1403801, 3008145, 4211403, 7019005, 21057015]

約数ペア:

[(1, 21057015), (3, 7019005), (5, 4211403), (7, 3008145), (15, 1403801), (21, 1002715), (35, 601629), (49, 429735), (105, 200543), (147, 143245), (245, 85947), (735, 28649)]