76640420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{431}}^1\times {\mathrm{523}}^1$

素因数の和:980

約数の個数: 48

約数和(自身を含む): 171134208

約数和(自身を除く): 94493788

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 431, 523, 862, 1046, 1724, 2092, 2155, 2615, 4310, 5230, 7327, 8620, 8891, 10460, 14654, 17782, 29308, 35564, 36635, 44455, 73270, 88910, 146540, 177820, 225413, 450826, 901652, 1127065, 2254130, 3832021, 4508260, 7664042, 15328084, 19160105, 38320210, 76640420]

約数ペア:

[(1, 76640420), (2, 38320210), (4, 19160105), (5, 15328084), (10, 7664042), (17, 4508260), (20, 3832021), (34, 2254130), (68, 1127065), (85, 901652), (170, 450826), (340, 225413), (431, 177820), (523, 146540), (862, 88910), (1046, 73270), (1724, 44455), (2092, 36635), (2155, 35564), (2615, 29308), (4310, 17782), (5230, 14654), (7327, 10460), (8620, 8891)]