20739975

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 36009600

約数和(自身を除く): 15269625

約数列:

[1, 3, 5, 15, 25, 43, 59, 75, 109, 129, 177, 215, 295, 327, 545, 645, 885, 1075, 1475, 1635, 2537, 2725, 3225, 4425, 4687, 6431, 7611, 8175, 12685, 14061, 19293, 23435, 32155, 38055, 63425, 70305, 96465, 117175, 160775, 190275, 276533, 351525, 482325, 829599, 1382665, 4147995, 6913325, 20739975]

約数ペア:

[(1, 20739975), (3, 6913325), (5, 4147995), (15, 1382665), (25, 829599), (43, 482325), (59, 351525), (75, 276533), (109, 190275), (129, 160775), (177, 117175), (215, 96465), (295, 70305), (327, 63425), (545, 38055), (645, 32155), (885, 23435), (1075, 19293), (1475, 14061), (1635, 12685), (2537, 8175), (2725, 7611), (3225, 6431), (4425, 4687)]