21106995

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^2$

素因数の和:129

約数の個数: 72

約数和(自身を含む): 43226064

約数和(自身を除く): 22119069

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 47, 49, 65, 91, 105, 141, 147, 195, 235, 245, 273, 329, 455, 611, 637, 705, 735, 987, 1365, 1645, 1833, 1911, 2209, 2303, 3055, 3185, 4277, 4935, 6627, 6909, 9165, 9555, 11045, 11515, 12831, 15463, 21385, 28717, 29939, 33135, 34545, 46389, 64155, 77315, 86151, 89817, 108241, 143585, 149695, 201019, 231945, 324723, 430755, 449085, 541205, 603057, 1005095, 1407133, 1623615, 3015285, 4221399, 7035665, 21106995]

約数ペア:

[(1, 21106995), (3, 7035665), (5, 4221399), (7, 3015285), (13, 1623615), (15, 1407133), (21, 1005095), (35, 603057), (39, 541205), (47, 449085), (49, 430755), (65, 324723), (91, 231945), (105, 201019), (141, 149695), (147, 143585), (195, 108241), (235, 89817), (245, 86151), (273, 77315), (329, 64155), (455, 46389), (611, 34545), (637, 33135), (705, 29939), (735, 28717), (987, 21385), (1365, 15463), (1645, 12831), (1833, 11515), (1911, 11045), (2209, 9555), (2303, 9165), (3055, 6909), (3185, 6627), (4277, 4935)]