21821820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{367}}^1\times {\mathrm{991}}^1$

素因数の和:1370

約数の個数: 48

約数和(自身を含む): 61329408

約数和(自身を除く): 39507588

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 367, 734, 991, 1101, 1468, 1835, 1982, 2202, 2973, 3670, 3964, 4404, 4955, 5505, 5946, 7340, 9910, 11010, 11892, 14865, 19820, 22020, 29730, 59460, 363697, 727394, 1091091, 1454788, 1818485, 2182182, 3636970, 4364364, 5455455, 7273940, 10910910, 21821820]

約数ペア:

[(1, 21821820), (2, 10910910), (3, 7273940), (4, 5455455), (5, 4364364), (6, 3636970), (10, 2182182), (12, 1818485), (15, 1454788), (20, 1091091), (30, 727394), (60, 363697), (367, 59460), (734, 29730), (991, 22020), (1101, 19820), (1468, 14865), (1835, 11892), (1982, 11010), (2202, 9910), (2973, 7340), (3670, 5946), (3964, 5505), (4404, 4955)]