81565640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{691}}^1$

素因数の和:942

約数の個数: 64

約数和(自身を含む): 198797760

約数和(自身を除く): 117232120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 227, 260, 454, 520, 691, 908, 1135, 1382, 1816, 2270, 2764, 2951, 3455, 4540, 5528, 5902, 6910, 8983, 9080, 11804, 13820, 14755, 17966, 23608, 27640, 29510, 35932, 44915, 59020, 71864, 89830, 118040, 156857, 179660, 313714, 359320, 627428, 784285, 1254856, 1568570, 2039141, 3137140, 4078282, 6274280, 8156564, 10195705, 16313128, 20391410, 40782820, 81565640]

約数ペア:

[(1, 81565640), (2, 40782820), (4, 20391410), (5, 16313128), (8, 10195705), (10, 8156564), (13, 6274280), (20, 4078282), (26, 3137140), (40, 2039141), (52, 1568570), (65, 1254856), (104, 784285), (130, 627428), (227, 359320), (260, 313714), (454, 179660), (520, 156857), (691, 118040), (908, 89830), (1135, 71864), (1382, 59020), (1816, 44915), (2270, 35932), (2764, 29510), (2951, 27640), (3455, 23608), (4540, 17966), (5528, 14755), (5902, 13820), (6910, 11804), (8983, 9080)]