640590

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{163}}^1$

素因数の和:304

約数の個数: 32

約数和(自身を含む): 1558656

約数和(自身を除く): 918066

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 131, 163, 262, 326, 393, 489, 655, 786, 815, 978, 1310, 1630, 1965, 2445, 3930, 4890, 21353, 42706, 64059, 106765, 128118, 213530, 320295, 640590]

約数ペア:

[(1, 640590), (2, 320295), (3, 213530), (5, 128118), (6, 106765), (10, 64059), (15, 42706), (30, 21353), (131, 4890), (163, 3930), (262, 2445), (326, 1965), (393, 1630), (489, 1310), (655, 978), (786, 815)]