640575

素因数分解:

$3^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1$

素因数の和:105

約数の個数: 48

約数和(自身を含む): 1284640

約数和(自身を除く): 644065

約数列:

[1, 3, 5, 9, 13, 15, 25, 27, 39, 45, 65, 73, 75, 117, 135, 195, 219, 225, 325, 351, 365, 585, 657, 675, 949, 975, 1095, 1755, 1825, 1971, 2847, 2925, 3285, 4745, 5475, 8541, 8775, 9855, 14235, 16425, 23725, 25623, 42705, 49275, 71175, 128115, 213525, 640575]

約数ペア:

[(1, 640575), (3, 213525), (5, 128115), (9, 71175), (13, 49275), (15, 42705), (25, 25623), (27, 23725), (39, 16425), (45, 14235), (65, 9855), (73, 8775), (75, 8541), (117, 5475), (135, 4745), (195, 3285), (219, 2925), (225, 2847), (325, 1971), (351, 1825), (365, 1755), (585, 1095), (657, 975), (675, 949)]