20781189

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{241}}^1$

素因数の和:338

約数の個数: 48

約数和(自身を含む): 35939904

約数和(自身を除く): 15158715

約数列:

[1, 3, 9, 11, 13, 33, 39, 67, 99, 117, 143, 201, 241, 429, 603, 723, 737, 871, 1287, 2169, 2211, 2613, 2651, 3133, 6633, 7839, 7953, 9399, 9581, 16147, 23859, 28197, 28743, 34463, 48441, 86229, 103389, 145323, 177617, 209911, 310167, 532851, 629733, 1598553, 1889199, 2309021, 6927063, 20781189]

約数ペア:

[(1, 20781189), (3, 6927063), (9, 2309021), (11, 1889199), (13, 1598553), (33, 629733), (39, 532851), (67, 310167), (99, 209911), (117, 177617), (143, 145323), (201, 103389), (241, 86229), (429, 48441), (603, 34463), (723, 28743), (737, 28197), (871, 23859), (1287, 16147), (2169, 9581), (2211, 9399), (2613, 7953), (2651, 7839), (3133, 6633)]