20640060

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16381}}^1$

素因数の和:16403

約数の個数: 72

約数和(自身を含む): 71556576

約数和(自身を除く): 50916516

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16381, 32762, 49143, 65524, 81905, 98286, 114667, 147429, 163810, 196572, 229334, 245715, 294858, 327620, 344001, 458668, 491430, 573335, 589716, 688002, 737145, 982860, 1032003, 1146670, 1376004, 1474290, 1720005, 2064006, 2293340, 2948580, 3440010, 4128012, 5160015, 6880020, 10320030, 20640060]

約数ペア:

[(1, 20640060), (2, 10320030), (3, 6880020), (4, 5160015), (5, 4128012), (6, 3440010), (7, 2948580), (9, 2293340), (10, 2064006), (12, 1720005), (14, 1474290), (15, 1376004), (18, 1146670), (20, 1032003), (21, 982860), (28, 737145), (30, 688002), (35, 589716), (36, 573335), (42, 491430), (45, 458668), (60, 344001), (63, 327620), (70, 294858), (84, 245715), (90, 229334), (105, 196572), (126, 163810), (140, 147429), (180, 114667), (210, 98286), (252, 81905), (315, 65524), (420, 49143), (630, 32762), (1260, 16381)]