21646620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{499}}^1$

素因数の和:755

約数の個数: 72

約数和(自身を含む): 66066000

約数和(自身を除く): 44419380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 241, 482, 499, 723, 964, 998, 1205, 1446, 1497, 1996, 2169, 2410, 2495, 2892, 2994, 3615, 4338, 4491, 4820, 4990, 5988, 7230, 7485, 8676, 8982, 9980, 10845, 14460, 14970, 17964, 21690, 22455, 29940, 43380, 44910, 89820, 120259, 240518, 360777, 481036, 601295, 721554, 1082331, 1202590, 1443108, 1803885, 2164662, 2405180, 3607770, 4329324, 5411655, 7215540, 10823310, 21646620]

約数ペア:

[(1, 21646620), (2, 10823310), (3, 7215540), (4, 5411655), (5, 4329324), (6, 3607770), (9, 2405180), (10, 2164662), (12, 1803885), (15, 1443108), (18, 1202590), (20, 1082331), (30, 721554), (36, 601295), (45, 481036), (60, 360777), (90, 240518), (180, 120259), (241, 89820), (482, 44910), (499, 43380), (723, 29940), (964, 22455), (998, 21690), (1205, 17964), (1446, 14970), (1497, 14460), (1996, 10845), (2169, 9980), (2410, 8982), (2495, 8676), (2892, 7485), (2994, 7230), (3615, 5988), (4338, 4990), (4491, 4820)]