81810040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157327}}^1$

素因数の和:157351

約数の個数: 32

約数和(自身を含む): 198233280

約数和(自身を除く): 116423240

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 157327, 314654, 629308, 786635, 1258616, 1573270, 2045251, 3146540, 4090502, 6293080, 8181004, 10226255, 16362008, 20452510, 40905020, 81810040]

約数ペア:

[(1, 81810040), (2, 40905020), (4, 20452510), (5, 16362008), (8, 10226255), (10, 8181004), (13, 6293080), (20, 4090502), (26, 3146540), (40, 2045251), (52, 1573270), (65, 1258616), (104, 786635), (130, 629308), (260, 314654), (520, 157327)]