644080

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{97}}^1$

素因数の和:193

約数の個数: 40

約数和(自身を含む): 1531152

約数和(自身を除く): 887072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 97, 166, 194, 332, 388, 415, 485, 664, 776, 830, 970, 1328, 1552, 1660, 1940, 3320, 3880, 6640, 7760, 8051, 16102, 32204, 40255, 64408, 80510, 128816, 161020, 322040, 644080]

約数ペア:

[(1, 644080), (2, 322040), (4, 161020), (5, 128816), (8, 80510), (10, 64408), (16, 40255), (20, 32204), (40, 16102), (80, 8051), (83, 7760), (97, 6640), (166, 3880), (194, 3320), (332, 1940), (388, 1660), (415, 1552), (485, 1328), (664, 970), (776, 830)]