20597980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{349}}^1$

素因数の和:598

約数の個数: 48

約数和(自身を含む): 46922400

約数和(自身を除く): 26324420

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 227, 260, 349, 454, 698, 908, 1135, 1396, 1745, 2270, 2951, 3490, 4537, 4540, 5902, 6980, 9074, 11804, 14755, 18148, 22685, 29510, 45370, 59020, 79223, 90740, 158446, 316892, 396115, 792230, 1029899, 1584460, 2059798, 4119596, 5149495, 10298990, 20597980]

約数ペア:

[(1, 20597980), (2, 10298990), (4, 5149495), (5, 4119596), (10, 2059798), (13, 1584460), (20, 1029899), (26, 792230), (52, 396115), (65, 316892), (130, 158446), (227, 90740), (260, 79223), (349, 59020), (454, 45370), (698, 29510), (908, 22685), (1135, 18148), (1396, 14755), (1745, 11804), (2270, 9074), (2951, 6980), (3490, 5902), (4537, 4540)]