28158980

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 61205760

約数和(自身を除く): 33046780

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 137, 172, 215, 239, 274, 430, 478, 548, 685, 860, 956, 1195, 1370, 2390, 2740, 4780, 5891, 10277, 11782, 20554, 23564, 29455, 32743, 41108, 51385, 58910, 65486, 102770, 117820, 130972, 163715, 205540, 327430, 654860, 1407949, 2815898, 5631796, 7039745, 14079490, 28158980]

約数ペア:

[(1, 28158980), (2, 14079490), (4, 7039745), (5, 5631796), (10, 2815898), (20, 1407949), (43, 654860), (86, 327430), (137, 205540), (172, 163715), (215, 130972), (239, 117820), (274, 102770), (430, 65486), (478, 58910), (548, 51385), (685, 41108), (860, 32743), (956, 29455), (1195, 23564), (1370, 20554), (2390, 11782), (2740, 10277), (4780, 5891)]