21397900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{307}}^1$

素因数の和:379

約数の個数: 72

約数和(自身を含む): 50528016

約数和(自身を除く): 29130116

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 41, 50, 68, 82, 85, 100, 164, 170, 205, 307, 340, 410, 425, 614, 697, 820, 850, 1025, 1228, 1394, 1535, 1700, 2050, 2788, 3070, 3485, 4100, 5219, 6140, 6970, 7675, 10438, 12587, 13940, 15350, 17425, 20876, 25174, 26095, 30700, 34850, 50348, 52190, 62935, 69700, 104380, 125870, 130475, 213979, 251740, 260950, 314675, 427958, 521900, 629350, 855916, 1069895, 1258700, 2139790, 4279580, 5349475, 10698950, 21397900]

約数ペア:

[(1, 21397900), (2, 10698950), (4, 5349475), (5, 4279580), (10, 2139790), (17, 1258700), (20, 1069895), (25, 855916), (34, 629350), (41, 521900), (50, 427958), (68, 314675), (82, 260950), (85, 251740), (100, 213979), (164, 130475), (170, 125870), (205, 104380), (307, 69700), (340, 62935), (410, 52190), (425, 50348), (614, 34850), (697, 30700), (820, 26095), (850, 25174), (1025, 20876), (1228, 17425), (1394, 15350), (1535, 13940), (1700, 12587), (2050, 10438), (2788, 7675), (3070, 6970), (3485, 6140), (4100, 5219)]