21586740

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:621

約数の個数: 96

約数和(自身を含む): 69888000

約数和(自身を除く): 48301260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 103, 105, 140, 206, 210, 309, 412, 420, 499, 515, 618, 721, 998, 1030, 1236, 1442, 1497, 1545, 1996, 2060, 2163, 2495, 2884, 2994, 3090, 3493, 3605, 4326, 4990, 5988, 6180, 6986, 7210, 7485, 8652, 9980, 10479, 10815, 13972, 14420, 14970, 17465, 20958, 21630, 29940, 34930, 41916, 43260, 51397, 52395, 69860, 102794, 104790, 154191, 205588, 209580, 256985, 308382, 359779, 513970, 616764, 719558, 770955, 1027940, 1079337, 1439116, 1541910, 1798895, 2158674, 3083820, 3597790, 4317348, 5396685, 7195580, 10793370, 21586740]

約数ペア:

[(1, 21586740), (2, 10793370), (3, 7195580), (4, 5396685), (5, 4317348), (6, 3597790), (7, 3083820), (10, 2158674), (12, 1798895), (14, 1541910), (15, 1439116), (20, 1079337), (21, 1027940), (28, 770955), (30, 719558), (35, 616764), (42, 513970), (60, 359779), (70, 308382), (84, 256985), (103, 209580), (105, 205588), (140, 154191), (206, 104790), (210, 102794), (309, 69860), (412, 52395), (420, 51397), (499, 43260), (515, 41916), (618, 34930), (721, 29940), (998, 21630), (1030, 20958), (1236, 17465), (1442, 14970), (1497, 14420), (1545, 13972), (1996, 10815), (2060, 10479), (2163, 9980), (2495, 8652), (2884, 7485), (2994, 7210), (3090, 6986), (3493, 6180), (3605, 5988), (4326, 4990)]