81862820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{18521}}^1$

素因数の和:18560

約数の個数: 48

約数和(自身を含む): 196036848

約数和(自身を除く): 114174028

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 18521, 37042, 74084, 92605, 185210, 240773, 314857, 370420, 481546, 629714, 963092, 1203865, 1259428, 1574285, 2407730, 3148570, 4093141, 4815460, 6297140, 8186282, 16372564, 20465705, 40931410, 81862820]

約数ペア:

[(1, 81862820), (2, 40931410), (4, 20465705), (5, 16372564), (10, 8186282), (13, 6297140), (17, 4815460), (20, 4093141), (26, 3148570), (34, 2407730), (52, 1574285), (65, 1259428), (68, 1203865), (85, 963092), (130, 629714), (170, 481546), (221, 370420), (260, 314857), (340, 240773), (442, 185210), (884, 92605), (1105, 74084), (2210, 37042), (4420, 18521)]