20549900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{947}}^1$

素因数の和:999

約数の個数: 72

約数和(自身を含む): 52663296

約数和(自身を除く): 32113396

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 31, 35, 50, 62, 70, 100, 124, 140, 155, 175, 217, 310, 350, 434, 620, 700, 775, 868, 947, 1085, 1550, 1894, 2170, 3100, 3788, 4340, 4735, 5425, 6629, 9470, 10850, 13258, 18940, 21700, 23675, 26516, 29357, 33145, 47350, 58714, 66290, 94700, 117428, 132580, 146785, 165725, 205499, 293570, 331450, 410998, 587140, 662900, 733925, 821996, 1027495, 1467850, 2054990, 2935700, 4109980, 5137475, 10274950, 20549900]

約数ペア:

[(1, 20549900), (2, 10274950), (4, 5137475), (5, 4109980), (7, 2935700), (10, 2054990), (14, 1467850), (20, 1027495), (25, 821996), (28, 733925), (31, 662900), (35, 587140), (50, 410998), (62, 331450), (70, 293570), (100, 205499), (124, 165725), (140, 146785), (155, 132580), (175, 117428), (217, 94700), (310, 66290), (350, 58714), (434, 47350), (620, 33145), (700, 29357), (775, 26516), (868, 23675), (947, 21700), (1085, 18940), (1550, 13258), (1894, 10850), (2170, 9470), (3100, 6629), (3788, 5425), (4340, 4735)]