21797895

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{631}}^1$

素因数の和:700

約数の個数: 48

約数和(自身を含む): 41499648

約数和(自身を除く): 19701753

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 49, 105, 141, 147, 235, 245, 329, 631, 705, 735, 987, 1645, 1893, 2303, 3155, 4417, 4935, 6909, 9465, 11515, 13251, 22085, 29657, 30919, 34545, 66255, 88971, 92757, 148285, 154595, 207599, 444855, 463785, 622797, 1037995, 1453193, 3113985, 4359579, 7265965, 21797895]

約数ペア:

[(1, 21797895), (3, 7265965), (5, 4359579), (7, 3113985), (15, 1453193), (21, 1037995), (35, 622797), (47, 463785), (49, 444855), (105, 207599), (141, 154595), (147, 148285), (235, 92757), (245, 88971), (329, 66255), (631, 34545), (705, 30919), (735, 29657), (987, 22085), (1645, 13251), (1893, 11515), (2303, 9465), (3155, 6909), (4417, 4935)]