20808720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{28901}}^1$

素因数の和:28920

約数の個数: 60

約数和(自身を含む): 69885036

約数和(自身を除く): 49076316

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 28901, 57802, 86703, 115604, 144505, 173406, 231208, 260109, 289010, 346812, 433515, 462416, 520218, 578020, 693624, 867030, 1040436, 1156040, 1300545, 1387248, 1734060, 2080872, 2312080, 2601090, 3468120, 4161744, 5202180, 6936240, 10404360, 20808720]

約数ペア:

[(1, 20808720), (2, 10404360), (3, 6936240), (4, 5202180), (5, 4161744), (6, 3468120), (8, 2601090), (9, 2312080), (10, 2080872), (12, 1734060), (15, 1387248), (16, 1300545), (18, 1156040), (20, 1040436), (24, 867030), (30, 693624), (36, 578020), (40, 520218), (45, 462416), (48, 433515), (60, 346812), (72, 289010), (80, 260109), (90, 231208), (120, 173406), (144, 144505), (180, 115604), (240, 86703), (360, 57802), (720, 28901)]