20165775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{541}}^1$

素因数の和:632

約数の個数: 48

約数和(自身を含む): 38711808

約数和(自身を除く): 18546033

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 71, 75, 105, 175, 213, 355, 497, 525, 541, 1065, 1491, 1623, 1775, 2485, 2705, 3787, 5325, 7455, 8115, 11361, 12425, 13525, 18935, 37275, 38411, 40575, 56805, 94675, 115233, 192055, 268877, 284025, 576165, 806631, 960275, 1344385, 2880825, 4033155, 6721925, 20165775]

約数ペア:

[(1, 20165775), (3, 6721925), (5, 4033155), (7, 2880825), (15, 1344385), (21, 960275), (25, 806631), (35, 576165), (71, 284025), (75, 268877), (105, 192055), (175, 115233), (213, 94675), (355, 56805), (497, 40575), (525, 38411), (541, 37275), (1065, 18935), (1491, 13525), (1623, 12425), (1775, 11361), (2485, 8115), (2705, 7455), (3787, 5325)]