21558950

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{1987}}^1$

素因数の和:2037

約数の個数: 48

約数和(自身を含む): 47330304

約数和(自身を除く): 25771354

約数列:

[1, 2, 5, 7, 10, 14, 25, 31, 35, 50, 62, 70, 155, 175, 217, 310, 350, 434, 775, 1085, 1550, 1987, 2170, 3974, 5425, 9935, 10850, 13909, 19870, 27818, 49675, 61597, 69545, 99350, 123194, 139090, 307985, 347725, 431179, 615970, 695450, 862358, 1539925, 2155895, 3079850, 4311790, 10779475, 21558950]

約数ペア:

[(1, 21558950), (2, 10779475), (5, 4311790), (7, 3079850), (10, 2155895), (14, 1539925), (25, 862358), (31, 695450), (35, 615970), (50, 431179), (62, 347725), (70, 307985), (155, 139090), (175, 123194), (217, 99350), (310, 69545), (350, 61597), (434, 49675), (775, 27818), (1085, 19870), (1550, 13909), (1987, 10850), (2170, 9935), (3974, 5425)]