640705210

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{14869}}^1$

素因数の和:15046

約数の個数: 32

約数和(自身を含む): 1199116800

約数和(自身を除く): 558411590

約数列:

[1, 2, 5, 10, 31, 62, 139, 155, 278, 310, 695, 1390, 4309, 8618, 14869, 21545, 29738, 43090, 74345, 148690, 460939, 921878, 2066791, 2304695, 4133582, 4609390, 10333955, 20667910, 64070521, 128141042, 320352605, 640705210]

約数ペア:

[(1, 640705210), (2, 320352605), (5, 128141042), (10, 64070521), (31, 20667910), (62, 10333955), (139, 4609390), (155, 4133582), (278, 2304695), (310, 2066791), (695, 921878), (1390, 460939), (4309, 148690), (8618, 74345), (14869, 43090), (21545, 29738)]