21990654

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1$

素因数の和:194

約数の個数: 96

約数和(自身を含む): 57620160

約数和(自身を除く): 35629506

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 37, 42, 53, 63, 74, 89, 106, 111, 126, 159, 178, 222, 259, 267, 318, 333, 371, 477, 518, 534, 623, 666, 742, 777, 801, 954, 1113, 1246, 1554, 1602, 1869, 1961, 2226, 2331, 3293, 3339, 3738, 3922, 4662, 4717, 5607, 5883, 6586, 6678, 9434, 9879, 11214, 11766, 13727, 14151, 17649, 19758, 23051, 27454, 28302, 29637, 33019, 35298, 41181, 42453, 46102, 59274, 66038, 69153, 82362, 84906, 99057, 123543, 138306, 174529, 198114, 207459, 247086, 297171, 349058, 414918, 523587, 594342, 1047174, 1221703, 1570761, 2443406, 3141522, 3665109, 7330218, 10995327, 21990654]

約数ペア:

[(1, 21990654), (2, 10995327), (3, 7330218), (6, 3665109), (7, 3141522), (9, 2443406), (14, 1570761), (18, 1221703), (21, 1047174), (37, 594342), (42, 523587), (53, 414918), (63, 349058), (74, 297171), (89, 247086), (106, 207459), (111, 198114), (126, 174529), (159, 138306), (178, 123543), (222, 99057), (259, 84906), (267, 82362), (318, 69153), (333, 66038), (371, 59274), (477, 46102), (518, 42453), (534, 41181), (623, 35298), (666, 33019), (742, 29637), (777, 28302), (801, 27454), (954, 23051), (1113, 19758), (1246, 17649), (1554, 14151), (1602, 13727), (1869, 11766), (1961, 11214), (2226, 9879), (2331, 9434), (3293, 6678), (3339, 6586), (3738, 5883), (3922, 5607), (4662, 4717)]