20912175

素因数分解:

$3^4\times 5^2\times {\mathrm{23}}^1\times {\mathrm{449}}^1$

素因数の和:494

約数の個数: 60

約数和(自身を含む): 40510800

約数和(自身を除く): 19598625

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 81, 115, 135, 207, 225, 345, 405, 449, 575, 621, 675, 1035, 1347, 1725, 1863, 2025, 2245, 3105, 4041, 5175, 6735, 9315, 10327, 11225, 12123, 15525, 20205, 30981, 33675, 36369, 46575, 51635, 60615, 92943, 101025, 154905, 181845, 258175, 278829, 303075, 464715, 774525, 836487, 909225, 1394145, 2323575, 4182435, 6970725, 20912175]

約数ペア:

[(1, 20912175), (3, 6970725), (5, 4182435), (9, 2323575), (15, 1394145), (23, 909225), (25, 836487), (27, 774525), (45, 464715), (69, 303075), (75, 278829), (81, 258175), (115, 181845), (135, 154905), (207, 101025), (225, 92943), (345, 60615), (405, 51635), (449, 46575), (575, 36369), (621, 33675), (675, 30981), (1035, 20205), (1347, 15525), (1725, 12123), (1863, 11225), (2025, 10327), (2245, 9315), (3105, 6735), (4041, 5175)]