21399100

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 49371840

約数和(自身を除く): 27972740

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 47, 50, 58, 94, 100, 116, 145, 157, 188, 235, 290, 314, 470, 580, 628, 725, 785, 940, 1175, 1363, 1450, 1570, 2350, 2726, 2900, 3140, 3925, 4553, 4700, 5452, 6815, 7379, 7850, 9106, 13630, 14758, 15700, 18212, 22765, 27260, 29516, 34075, 36895, 45530, 68150, 73790, 91060, 113825, 136300, 147580, 184475, 213991, 227650, 368950, 427982, 455300, 737900, 855964, 1069955, 2139910, 4279820, 5349775, 10699550, 21399100]

約数ペア:

[(1, 21399100), (2, 10699550), (4, 5349775), (5, 4279820), (10, 2139910), (20, 1069955), (25, 855964), (29, 737900), (47, 455300), (50, 427982), (58, 368950), (94, 227650), (100, 213991), (116, 184475), (145, 147580), (157, 136300), (188, 113825), (235, 91060), (290, 73790), (314, 68150), (470, 45530), (580, 36895), (628, 34075), (725, 29516), (785, 27260), (940, 22765), (1175, 18212), (1363, 15700), (1450, 14758), (1570, 13630), (2350, 9106), (2726, 7850), (2900, 7379), (3140, 6815), (3925, 5452), (4553, 4700)]