20711925

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 40915784

約数和(自身を除く): 20203859

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 73, 75, 97, 117, 195, 219, 225, 291, 325, 365, 485, 585, 657, 873, 949, 975, 1095, 1261, 1455, 1825, 2425, 2847, 2925, 3285, 3783, 4365, 4745, 5475, 6305, 7081, 7275, 8541, 11349, 14235, 16425, 18915, 21243, 21825, 23725, 31525, 35405, 42705, 56745, 63729, 71175, 92053, 94575, 106215, 177025, 213525, 276159, 283725, 318645, 460265, 531075, 828477, 1380795, 1593225, 2301325, 4142385, 6903975, 20711925]

約数ペア:

[(1, 20711925), (3, 6903975), (5, 4142385), (9, 2301325), (13, 1593225), (15, 1380795), (25, 828477), (39, 531075), (45, 460265), (65, 318645), (73, 283725), (75, 276159), (97, 213525), (117, 177025), (195, 106215), (219, 94575), (225, 92053), (291, 71175), (325, 63729), (365, 56745), (485, 42705), (585, 35405), (657, 31525), (873, 23725), (949, 21825), (975, 21243), (1095, 18915), (1261, 16425), (1455, 14235), (1825, 11349), (2425, 8541), (2847, 7275), (2925, 7081), (3285, 6305), (3783, 5475), (4365, 4745)]