18630380

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{199}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 40857600

約数和(自身を除く): 22227220

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 151, 155, 199, 302, 310, 398, 604, 620, 755, 796, 995, 1510, 1990, 3020, 3980, 4681, 6169, 9362, 12338, 18724, 23405, 24676, 30049, 30845, 46810, 60098, 61690, 93620, 120196, 123380, 150245, 300490, 600980, 931519, 1863038, 3726076, 4657595, 9315190, 18630380]

約数ペア:

[(1, 18630380), (2, 9315190), (4, 4657595), (5, 3726076), (10, 1863038), (20, 931519), (31, 600980), (62, 300490), (124, 150245), (151, 123380), (155, 120196), (199, 93620), (302, 61690), (310, 60098), (398, 46810), (604, 30845), (620, 30049), (755, 24676), (796, 23405), (995, 18724), (1510, 12338), (1990, 9362), (3020, 6169), (3980, 4681)]