18171920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{173}}^1$

素因数の和:300

約数の個数: 80

約数和(自身を含む): 46215792

約数和(自身を除く): 28043872

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 101, 104, 130, 173, 202, 208, 260, 346, 404, 505, 520, 692, 808, 865, 1010, 1040, 1313, 1384, 1616, 1730, 2020, 2249, 2626, 2768, 3460, 4040, 4498, 5252, 6565, 6920, 8080, 8996, 10504, 11245, 13130, 13840, 17473, 17992, 21008, 22490, 26260, 34946, 35984, 44980, 52520, 69892, 87365, 89960, 105040, 139784, 174730, 179920, 227149, 279568, 349460, 454298, 698920, 908596, 1135745, 1397840, 1817192, 2271490, 3634384, 4542980, 9085960, 18171920]

約数ペア:

[(1, 18171920), (2, 9085960), (4, 4542980), (5, 3634384), (8, 2271490), (10, 1817192), (13, 1397840), (16, 1135745), (20, 908596), (26, 698920), (40, 454298), (52, 349460), (65, 279568), (80, 227149), (101, 179920), (104, 174730), (130, 139784), (173, 105040), (202, 89960), (208, 87365), (260, 69892), (346, 52520), (404, 44980), (505, 35984), (520, 34946), (692, 26260), (808, 22490), (865, 21008), (1010, 17992), (1040, 17473), (1313, 13840), (1384, 13130), (1616, 11245), (1730, 10504), (2020, 8996), (2249, 8080), (2626, 6920), (2768, 6565), (3460, 5252), (4040, 4498)]