638187860

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{331}}^1\times {\mathrm{647}}^1$

素因数の和:1136

約数の個数: 48

約数和(自身を含む): 1355356800

約数和(自身を除く): 717168940

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 331, 596, 647, 662, 745, 1294, 1324, 1490, 1655, 2588, 2980, 3235, 3310, 6470, 6620, 12940, 49319, 96403, 98638, 192806, 197276, 214157, 246595, 385612, 428314, 482015, 493190, 856628, 964030, 986380, 1070785, 1928060, 2141570, 4283140, 31909393, 63818786, 127637572, 159546965, 319093930, 638187860]

約数ペア:

[(1, 638187860), (2, 319093930), (4, 159546965), (5, 127637572), (10, 63818786), (20, 31909393), (149, 4283140), (298, 2141570), (331, 1928060), (596, 1070785), (647, 986380), (662, 964030), (745, 856628), (1294, 493190), (1324, 482015), (1490, 428314), (1655, 385612), (2588, 246595), (2980, 214157), (3235, 197276), (3310, 192806), (6470, 98638), (6620, 96403), (12940, 49319)]