21116988

素因数分解:

$2^2\times 3^2\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{179}}^1$

素因数の和:331

約数の個数: 72

約数和(自身を含む): 56019600

約数和(自身を除く): 34902612

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 29, 36, 58, 87, 113, 116, 174, 179, 226, 261, 339, 348, 358, 452, 522, 537, 678, 716, 1017, 1044, 1074, 1356, 1611, 2034, 2148, 3222, 3277, 4068, 5191, 6444, 6554, 9831, 10382, 13108, 15573, 19662, 20227, 20764, 29493, 31146, 39324, 40454, 46719, 58986, 60681, 62292, 80908, 93438, 117972, 121362, 182043, 186876, 242724, 364086, 586583, 728172, 1173166, 1759749, 2346332, 3519498, 5279247, 7038996, 10558494, 21116988]

約数ペア:

[(1, 21116988), (2, 10558494), (3, 7038996), (4, 5279247), (6, 3519498), (9, 2346332), (12, 1759749), (18, 1173166), (29, 728172), (36, 586583), (58, 364086), (87, 242724), (113, 186876), (116, 182043), (174, 121362), (179, 117972), (226, 93438), (261, 80908), (339, 62292), (348, 60681), (358, 58986), (452, 46719), (522, 40454), (537, 39324), (678, 31146), (716, 29493), (1017, 20764), (1044, 20227), (1074, 19662), (1356, 15573), (1611, 13108), (2034, 10382), (2148, 9831), (3222, 6554), (3277, 6444), (4068, 5191)]