21242529

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1$

素因数の和:211

約数の個数: 72

約数和(自身を含む): 40547520

約数和(自身を除く): 19304991

約数列:

[1, 3, 7, 9, 11, 21, 29, 33, 49, 63, 77, 87, 99, 147, 151, 203, 231, 261, 319, 441, 453, 539, 609, 693, 957, 1057, 1359, 1421, 1617, 1661, 1827, 2233, 2871, 3171, 4263, 4379, 4851, 4983, 6699, 7399, 9513, 11627, 12789, 13137, 14949, 15631, 20097, 22197, 30653, 34881, 39411, 46893, 48169, 66591, 81389, 91959, 104643, 140679, 144507, 214571, 244167, 275877, 337183, 433521, 643713, 732501, 1011549, 1931139, 2360281, 3034647, 7080843, 21242529]

約数ペア:

[(1, 21242529), (3, 7080843), (7, 3034647), (9, 2360281), (11, 1931139), (21, 1011549), (29, 732501), (33, 643713), (49, 433521), (63, 337183), (77, 275877), (87, 244167), (99, 214571), (147, 144507), (151, 140679), (203, 104643), (231, 91959), (261, 81389), (319, 66591), (441, 48169), (453, 46893), (539, 39411), (609, 34881), (693, 30653), (957, 22197), (1057, 20097), (1359, 15631), (1421, 14949), (1617, 13137), (1661, 12789), (1827, 11627), (2233, 9513), (2871, 7399), (3171, 6699), (4263, 4983), (4379, 4851)]