81231813

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{269}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 132678000

約数和(自身を除く): 51446187

約数列:

[1, 3, 9, 13, 29, 39, 87, 89, 117, 261, 267, 269, 377, 801, 807, 1131, 1157, 2421, 2581, 3393, 3471, 3497, 7743, 7801, 10413, 10491, 23229, 23403, 23941, 31473, 33553, 70209, 71823, 100659, 101413, 215469, 301977, 304239, 311233, 694289, 912717, 933699, 2082867, 2801097, 6248601, 9025757, 27077271, 81231813]

約数ペア:

[(1, 81231813), (3, 27077271), (9, 9025757), (13, 6248601), (29, 2801097), (39, 2082867), (87, 933699), (89, 912717), (117, 694289), (261, 311233), (267, 304239), (269, 301977), (377, 215469), (801, 101413), (807, 100659), (1131, 71823), (1157, 70209), (2421, 33553), (2581, 31473), (3393, 23941), (3471, 23403), (3497, 23229), (7743, 10491), (7801, 10413)]