20800080

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4127}}^1$

素因数の和:4153

約数の個数: 120

約数和(自身を含む): 79852032

約数和(自身を除く): 59051952

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4127, 5040, 8254, 12381, 16508, 20635, 24762, 28889, 33016, 37143, 41270, 49524, 57778, 61905, 66032, 74286, 82540, 86667, 99048, 115556, 123810, 144445, 148572, 165080, 173334, 185715, 198096, 231112, 247620, 260001, 288890, 297144, 330160, 346668, 371430, 433335, 462224, 495240, 520002, 577780, 594288, 693336, 742860, 866670, 990480, 1040004, 1155560, 1300005, 1386672, 1485720, 1733340, 2080008, 2311120, 2600010, 2971440, 3466680, 4160016, 5200020, 6933360, 10400040, 20800080]

約数ペア:

[(1, 20800080), (2, 10400040), (3, 6933360), (4, 5200020), (5, 4160016), (6, 3466680), (7, 2971440), (8, 2600010), (9, 2311120), (10, 2080008), (12, 1733340), (14, 1485720), (15, 1386672), (16, 1300005), (18, 1155560), (20, 1040004), (21, 990480), (24, 866670), (28, 742860), (30, 693336), (35, 594288), (36, 577780), (40, 520002), (42, 495240), (45, 462224), (48, 433335), (56, 371430), (60, 346668), (63, 330160), (70, 297144), (72, 288890), (80, 260001), (84, 247620), (90, 231112), (105, 198096), (112, 185715), (120, 173334), (126, 165080), (140, 148572), (144, 144445), (168, 123810), (180, 115556), (210, 99048), (240, 86667), (252, 82540), (280, 74286), (315, 66032), (336, 61905), (360, 57778), (420, 49524), (504, 41270), (560, 37143), (630, 33016), (720, 28889), (840, 24762), (1008, 20635), (1260, 16508), (1680, 12381), (2520, 8254), (4127, 5040)]