20872725

素因数分解:

$3^1\times 5^2\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 36158400

約数和(自身を除く): 15285675

約数列:

[1, 3, 5, 15, 25, 53, 59, 75, 89, 159, 177, 265, 267, 295, 445, 795, 885, 1325, 1335, 1475, 2225, 3127, 3975, 4425, 4717, 5251, 6675, 9381, 14151, 15635, 15753, 23585, 26255, 46905, 70755, 78175, 78765, 117925, 131275, 234525, 278303, 353775, 393825, 834909, 1391515, 4174545, 6957575, 20872725]

約数ペア:

[(1, 20872725), (3, 6957575), (5, 4174545), (15, 1391515), (25, 834909), (53, 393825), (59, 353775), (75, 278303), (89, 234525), (159, 131275), (177, 117925), (265, 78765), (267, 78175), (295, 70755), (445, 46905), (795, 26255), (885, 23585), (1325, 15753), (1335, 15635), (1475, 14151), (2225, 9381), (3127, 6675), (3975, 5251), (4425, 4717)]