18995205

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{163}}^1\times {\mathrm{457}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 32448384

約数和(自身を除く): 13453179

約数列:

[1, 3, 5, 15, 17, 51, 85, 163, 255, 457, 489, 815, 1371, 2285, 2445, 2771, 6855, 7769, 8313, 13855, 23307, 38845, 41565, 74491, 116535, 223473, 372455, 1117365, 1266347, 3799041, 6331735, 18995205]

約数ペア:

[(1, 18995205), (3, 6331735), (5, 3799041), (15, 1266347), (17, 1117365), (51, 372455), (85, 223473), (163, 116535), (255, 74491), (457, 41565), (489, 38845), (815, 23307), (1371, 13855), (2285, 8313), (2445, 7769), (2771, 6855)]