21752175

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 37988640

約数和(自身を除く): 16236465

約数列:

[1, 3, 5, 15, 25, 29, 73, 75, 87, 137, 145, 219, 365, 411, 435, 685, 725, 1095, 1825, 2055, 2117, 2175, 3425, 3973, 5475, 6351, 10001, 10275, 10585, 11919, 19865, 30003, 31755, 50005, 52925, 59595, 99325, 150015, 158775, 250025, 290029, 297975, 750075, 870087, 1450145, 4350435, 7250725, 21752175]

約数ペア:

[(1, 21752175), (3, 7250725), (5, 4350435), (15, 1450145), (25, 870087), (29, 750075), (73, 297975), (75, 290029), (87, 250025), (137, 158775), (145, 150015), (219, 99325), (365, 59595), (411, 52925), (435, 50005), (685, 31755), (725, 30003), (1095, 19865), (1825, 11919), (2055, 10585), (2117, 10275), (2175, 10001), (3425, 6351), (3973, 5475)]