21106980

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:168

約数の個数: 144

約数和(自身を含む): 68612544

約数和(自身を除く): 47505564

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 43, 45, 54, 60, 81, 86, 90, 101, 108, 129, 135, 162, 172, 180, 202, 215, 243, 258, 270, 303, 324, 387, 404, 405, 430, 486, 505, 516, 540, 606, 645, 774, 810, 860, 909, 972, 1010, 1161, 1212, 1215, 1290, 1515, 1548, 1620, 1818, 1935, 2020, 2322, 2430, 2580, 2727, 3030, 3483, 3636, 3870, 4343, 4545, 4644, 4860, 5454, 5805, 6060, 6966, 7740, 8181, 8686, 9090, 10449, 10908, 11610, 13029, 13635, 13932, 16362, 17372, 17415, 18180, 20898, 21715, 23220, 24543, 26058, 27270, 32724, 34830, 39087, 40905, 41796, 43430, 49086, 52116, 52245, 54540, 65145, 69660, 78174, 81810, 86860, 98172, 104490, 117261, 122715, 130290, 156348, 163620, 195435, 208980, 234522, 245430, 260580, 351783, 390870, 469044, 490860, 586305, 703566, 781740, 1055349, 1172610, 1407132, 1758915, 2110698, 2345220, 3517830, 4221396, 5276745, 7035660, 10553490, 21106980]

約数ペア:

[(1, 21106980), (2, 10553490), (3, 7035660), (4, 5276745), (5, 4221396), (6, 3517830), (9, 2345220), (10, 2110698), (12, 1758915), (15, 1407132), (18, 1172610), (20, 1055349), (27, 781740), (30, 703566), (36, 586305), (43, 490860), (45, 469044), (54, 390870), (60, 351783), (81, 260580), (86, 245430), (90, 234522), (101, 208980), (108, 195435), (129, 163620), (135, 156348), (162, 130290), (172, 122715), (180, 117261), (202, 104490), (215, 98172), (243, 86860), (258, 81810), (270, 78174), (303, 69660), (324, 65145), (387, 54540), (404, 52245), (405, 52116), (430, 49086), (486, 43430), (505, 41796), (516, 40905), (540, 39087), (606, 34830), (645, 32724), (774, 27270), (810, 26058), (860, 24543), (909, 23220), (972, 21715), (1010, 20898), (1161, 18180), (1212, 17415), (1215, 17372), (1290, 16362), (1515, 13932), (1548, 13635), (1620, 13029), (1818, 11610), (1935, 10908), (2020, 10449), (2322, 9090), (2430, 8686), (2580, 8181), (2727, 7740), (3030, 6966), (3483, 6060), (3636, 5805), (3870, 5454), (4343, 4860), (4545, 4644)]