20642080

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7589}}^1$

素因数の和:7621

約数の個数: 48

約数和(自身を含む): 51642360

約数和(自身を除く): 31000280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7589, 15178, 30356, 37945, 60712, 75890, 121424, 129013, 151780, 242848, 258026, 303560, 516052, 607120, 645065, 1032104, 1214240, 1290130, 2064208, 2580260, 4128416, 5160520, 10321040, 20642080]

約数ペア:

[(1, 20642080), (2, 10321040), (4, 5160520), (5, 4128416), (8, 2580260), (10, 2064208), (16, 1290130), (17, 1214240), (20, 1032104), (32, 645065), (34, 607120), (40, 516052), (68, 303560), (80, 258026), (85, 242848), (136, 151780), (160, 129013), (170, 121424), (272, 75890), (340, 60712), (544, 37945), (680, 30356), (1360, 15178), (2720, 7589)]