20958075

素因数分解:

$3^3\times 5^2\times {\mathrm{61}}^1\times {\mathrm{509}}^1$

素因数の和:589

約数の個数: 48

約数和(自身を含む): 39208800

約数和(自身を除く): 18250725

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 61, 75, 135, 183, 225, 305, 509, 549, 675, 915, 1525, 1527, 1647, 2545, 2745, 4575, 4581, 7635, 8235, 12725, 13725, 13743, 22905, 31049, 38175, 41175, 68715, 93147, 114525, 155245, 279441, 343575, 465735, 776225, 838323, 1397205, 2328675, 4191615, 6986025, 20958075]

約数ペア:

[(1, 20958075), (3, 6986025), (5, 4191615), (9, 2328675), (15, 1397205), (25, 838323), (27, 776225), (45, 465735), (61, 343575), (75, 279441), (135, 155245), (183, 114525), (225, 93147), (305, 68715), (509, 41175), (549, 38175), (675, 31049), (915, 22905), (1525, 13743), (1527, 13725), (1647, 12725), (2545, 8235), (2745, 7635), (4575, 4581)]