19986568

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{397}}^1$

素因数の和:470

約数の個数: 64

約数和(自身を含む): 45849600

約数和(自身を除く): 25863032

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 31, 56, 58, 62, 116, 124, 203, 217, 232, 248, 397, 406, 434, 794, 812, 868, 899, 1588, 1624, 1736, 1798, 2779, 3176, 3596, 5558, 6293, 7192, 11116, 11513, 12307, 12586, 22232, 23026, 24614, 25172, 46052, 49228, 50344, 80591, 86149, 92104, 98456, 161182, 172298, 322364, 344596, 356903, 644728, 689192, 713806, 1427612, 2498321, 2855224, 4996642, 9993284, 19986568]

約数ペア:

[(1, 19986568), (2, 9993284), (4, 4996642), (7, 2855224), (8, 2498321), (14, 1427612), (28, 713806), (29, 689192), (31, 644728), (56, 356903), (58, 344596), (62, 322364), (116, 172298), (124, 161182), (203, 98456), (217, 92104), (232, 86149), (248, 80591), (397, 50344), (406, 49228), (434, 46052), (794, 25172), (812, 24614), (868, 23026), (899, 22232), (1588, 12586), (1624, 12307), (1736, 11513), (1798, 11116), (2779, 7192), (3176, 6293), (3596, 5558)]