20686575

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{433}}^1$

素因数の和:473

約数の個数: 72

約数和(自身を含む): 42945168

約数和(自身を除く): 22258593

約数列:

[1, 3, 5, 7, 13, 15, 21, 25, 35, 39, 49, 65, 75, 91, 105, 147, 175, 195, 245, 273, 325, 433, 455, 525, 637, 735, 975, 1225, 1299, 1365, 1911, 2165, 2275, 3031, 3185, 3675, 5629, 6495, 6825, 9093, 9555, 10825, 15155, 15925, 16887, 21217, 28145, 32475, 39403, 45465, 47775, 63651, 75775, 84435, 106085, 118209, 140725, 197015, 227325, 275821, 318255, 422175, 530425, 591045, 827463, 985075, 1379105, 1591275, 2955225, 4137315, 6895525, 20686575]

約数ペア:

[(1, 20686575), (3, 6895525), (5, 4137315), (7, 2955225), (13, 1591275), (15, 1379105), (21, 985075), (25, 827463), (35, 591045), (39, 530425), (49, 422175), (65, 318255), (75, 275821), (91, 227325), (105, 197015), (147, 140725), (175, 118209), (195, 106085), (245, 84435), (273, 75775), (325, 63651), (433, 47775), (455, 45465), (525, 39403), (637, 32475), (735, 28145), (975, 21217), (1225, 16887), (1299, 15925), (1365, 15155), (1911, 10825), (2165, 9555), (2275, 9093), (3031, 6825), (3185, 6495), (3675, 5629)]