398240

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:165

約数の個数: 48

約数和(自身を含む): 997920

約数和(自身を除く): 599680

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 131, 152, 160, 190, 262, 304, 380, 524, 608, 655, 760, 1048, 1310, 1520, 2096, 2489, 2620, 3040, 4192, 4978, 5240, 9956, 10480, 12445, 19912, 20960, 24890, 39824, 49780, 79648, 99560, 199120, 398240]

約数ペア:

[(1, 398240), (2, 199120), (4, 99560), (5, 79648), (8, 49780), (10, 39824), (16, 24890), (19, 20960), (20, 19912), (32, 12445), (38, 10480), (40, 9956), (76, 5240), (80, 4978), (95, 4192), (131, 3040), (152, 2620), (160, 2489), (190, 2096), (262, 1520), (304, 1310), (380, 1048), (524, 760), (608, 655)]