21903880

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 51425280

約数和(自身を除く): 29521400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 61, 94, 122, 188, 191, 235, 244, 305, 376, 382, 470, 488, 610, 764, 940, 955, 1220, 1528, 1880, 1910, 2440, 2867, 3820, 5734, 7640, 8977, 11468, 11651, 14335, 17954, 22936, 23302, 28670, 35908, 44885, 46604, 57340, 58255, 71816, 89770, 93208, 114680, 116510, 179540, 233020, 359080, 466040, 547597, 1095194, 2190388, 2737985, 4380776, 5475970, 10951940, 21903880]

約数ペア:

[(1, 21903880), (2, 10951940), (4, 5475970), (5, 4380776), (8, 2737985), (10, 2190388), (20, 1095194), (40, 547597), (47, 466040), (61, 359080), (94, 233020), (122, 179540), (188, 116510), (191, 114680), (235, 93208), (244, 89770), (305, 71816), (376, 58255), (382, 57340), (470, 46604), (488, 44885), (610, 35908), (764, 28670), (940, 23302), (955, 22936), (1220, 17954), (1528, 14335), (1880, 11651), (1910, 11468), (2440, 8977), (2867, 7640), (3820, 5734)]