19781820

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{12211}}^1$

素因数の和:12232

約数の個数: 60

約数和(自身を含む): 62061384

約数和(自身を除く): 42279564

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 12211, 24422, 36633, 48844, 61055, 73266, 109899, 122110, 146532, 183165, 219798, 244220, 329697, 366330, 439596, 549495, 659394, 732660, 989091, 1098990, 1318788, 1648485, 1978182, 2197980, 3296970, 3956364, 4945455, 6593940, 9890910, 19781820]

約数ペア:

[(1, 19781820), (2, 9890910), (3, 6593940), (4, 4945455), (5, 3956364), (6, 3296970), (9, 2197980), (10, 1978182), (12, 1648485), (15, 1318788), (18, 1098990), (20, 989091), (27, 732660), (30, 659394), (36, 549495), (45, 439596), (54, 366330), (60, 329697), (81, 244220), (90, 219798), (108, 183165), (135, 146532), (162, 122110), (180, 109899), (270, 73266), (324, 61055), (405, 48844), (540, 36633), (810, 24422), (1620, 12211)]