21639975

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{877}}^1$

素因数の和:944

約数の個数: 48

約数和(自身を含む): 41806848

約数和(自身を除く): 20166873

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 47, 75, 105, 141, 175, 235, 329, 525, 705, 877, 987, 1175, 1645, 2631, 3525, 4385, 4935, 6139, 8225, 13155, 18417, 21925, 24675, 30695, 41219, 65775, 92085, 123657, 153475, 206095, 288533, 460425, 618285, 865599, 1030475, 1442665, 3091425, 4327995, 7213325, 21639975]

約数ペア:

[(1, 21639975), (3, 7213325), (5, 4327995), (7, 3091425), (15, 1442665), (21, 1030475), (25, 865599), (35, 618285), (47, 460425), (75, 288533), (105, 206095), (141, 153475), (175, 123657), (235, 92085), (329, 65775), (525, 41219), (705, 30695), (877, 24675), (987, 21925), (1175, 18417), (1645, 13155), (2631, 8225), (3525, 6139), (4385, 4935)]