21990147249

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{487727}}^1$

素因数の和:487869

約数の個数: 32

約数和(自身を含む): 35584634880

約数和(自身を除く): 13594487631

約数列:

[1, 3, 7, 19, 21, 57, 113, 133, 339, 399, 791, 2147, 2373, 6441, 15029, 45087, 487727, 1463181, 3414089, 9266813, 10242267, 27800439, 55113151, 64867691, 165339453, 194603073, 385792057, 1047149869, 1157376171, 3141449607, 7330049083, 21990147249]

約数ペア:

[(1, 21990147249), (3, 7330049083), (7, 3141449607), (19, 1157376171), (21, 1047149869), (57, 385792057), (113, 194603073), (133, 165339453), (339, 64867691), (399, 55113151), (791, 27800439), (2147, 10242267), (2373, 9266813), (6441, 3414089), (15029, 1463181), (45087, 487727)]