19992500

素因数分解:

$2^2\times 5^4\times {\mathrm{11}}^1\times {\mathrm{727}}^1$

素因数の和:762

約数の個数: 60

約数和(自身を含む): 47759712

約数和(自身を除く): 27767212

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 125, 220, 250, 275, 500, 550, 625, 727, 1100, 1250, 1375, 1454, 2500, 2750, 2908, 3635, 5500, 6875, 7270, 7997, 13750, 14540, 15994, 18175, 27500, 31988, 36350, 39985, 72700, 79970, 90875, 159940, 181750, 199925, 363500, 399850, 454375, 799700, 908750, 999625, 1817500, 1999250, 3998500, 4998125, 9996250, 19992500]

約数ペア:

[(1, 19992500), (2, 9996250), (4, 4998125), (5, 3998500), (10, 1999250), (11, 1817500), (20, 999625), (22, 908750), (25, 799700), (44, 454375), (50, 399850), (55, 363500), (100, 199925), (110, 181750), (125, 159940), (220, 90875), (250, 79970), (275, 72700), (500, 39985), (550, 36350), (625, 31988), (727, 27500), (1100, 18175), (1250, 15994), (1375, 14540), (1454, 13750), (2500, 7997), (2750, 7270), (2908, 6875), (3635, 5500)]