81219370

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{1999}}^1$

素因数の和:2262

約数の個数: 32

約数和(自身を含む): 155520000

約数和(自身を除く): 74300630

約数列:

[1, 2, 5, 10, 17, 34, 85, 170, 239, 478, 1195, 1999, 2390, 3998, 4063, 8126, 9995, 19990, 20315, 33983, 40630, 67966, 169915, 339830, 477761, 955522, 2388805, 4777610, 8121937, 16243874, 40609685, 81219370]

約数ペア:

[(1, 81219370), (2, 40609685), (5, 16243874), (10, 8121937), (17, 4777610), (34, 2388805), (85, 955522), (170, 477761), (239, 339830), (478, 169915), (1195, 67966), (1999, 40630), (2390, 33983), (3998, 20315), (4063, 19990), (8126, 9995)]