21158115

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{397}}^1$

素因数の和:452

約数の個数: 64

約数和(自身を含む): 41264640

約数和(自身を除く): 20106525

約数列:

[1, 3, 5, 11, 15, 17, 19, 33, 51, 55, 57, 85, 95, 165, 187, 209, 255, 285, 323, 397, 561, 627, 935, 969, 1045, 1191, 1615, 1985, 2805, 3135, 3553, 4367, 4845, 5955, 6749, 7543, 10659, 13101, 17765, 20247, 21835, 22629, 33745, 37715, 53295, 65505, 74239, 82973, 101235, 113145, 128231, 222717, 248919, 371195, 384693, 414865, 641155, 1113585, 1244595, 1410541, 1923465, 4231623, 7052705, 21158115]

約数ペア:

[(1, 21158115), (3, 7052705), (5, 4231623), (11, 1923465), (15, 1410541), (17, 1244595), (19, 1113585), (33, 641155), (51, 414865), (55, 384693), (57, 371195), (85, 248919), (95, 222717), (165, 128231), (187, 113145), (209, 101235), (255, 82973), (285, 74239), (323, 65505), (397, 53295), (561, 37715), (627, 33745), (935, 22629), (969, 21835), (1045, 20247), (1191, 17765), (1615, 13101), (1985, 10659), (2805, 7543), (3135, 6749), (3553, 5955), (4367, 4845)]