639293361

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{39079}}^1$

素因数の和:39149

約数の個数: 32

約数和(自身を含む): 1050470400

約数和(自身を除く): 411177039

約数列:

[1, 3, 7, 19, 21, 41, 57, 123, 133, 287, 399, 779, 861, 2337, 5453, 16359, 39079, 117237, 273553, 742501, 820659, 1602239, 2227503, 4806717, 5197507, 11215673, 15592521, 30442541, 33647019, 91327623, 213097787, 639293361]

約数ペア:

[(1, 639293361), (3, 213097787), (7, 91327623), (19, 33647019), (21, 30442541), (41, 15592521), (57, 11215673), (123, 5197507), (133, 4806717), (287, 2227503), (399, 1602239), (779, 820659), (861, 742501), (2337, 273553), (5453, 117237), (16359, 39079)]