21473515

素因数分解:

$5^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{659}}^1$

素因数の和:704

約数の個数: 32

約数和(自身を含む): 31680000

約数和(自身を除く): 10206485

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 343, 659, 665, 931, 1715, 3295, 4613, 4655, 6517, 12521, 23065, 32291, 32585, 62605, 87647, 161455, 226037, 438235, 613529, 1130185, 3067645, 4294703, 21473515]

約数ペア:

[(1, 21473515), (5, 4294703), (7, 3067645), (19, 1130185), (35, 613529), (49, 438235), (95, 226037), (133, 161455), (245, 87647), (343, 62605), (659, 32585), (665, 32291), (931, 23065), (1715, 12521), (3295, 6517), (4613, 4655)]