21009780

素因数分解:

$2^2\times 3^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1$

素因数の和:169

約数の個数: 168

約数和(自身を含む): 72715104

約数和(自身を除く): 51705324

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 30, 33, 36, 44, 45, 54, 55, 60, 66, 81, 90, 99, 108, 110, 131, 132, 135, 162, 165, 180, 198, 220, 243, 262, 270, 297, 324, 330, 393, 396, 405, 486, 495, 524, 540, 594, 655, 660, 729, 786, 810, 891, 972, 990, 1179, 1188, 1215, 1310, 1441, 1458, 1485, 1572, 1620, 1782, 1965, 1980, 2358, 2430, 2620, 2673, 2882, 2916, 2970, 3537, 3564, 3645, 3930, 4323, 4455, 4716, 4860, 5346, 5764, 5895, 5940, 7074, 7205, 7290, 7860, 8019, 8646, 8910, 10611, 10692, 11790, 12969, 13365, 14148, 14410, 14580, 16038, 17292, 17685, 17820, 21222, 21615, 23580, 25938, 26730, 28820, 31833, 32076, 35370, 38907, 40095, 42444, 43230, 51876, 53055, 53460, 63666, 64845, 70740, 77814, 80190, 86460, 95499, 106110, 116721, 127332, 129690, 155628, 159165, 160380, 190998, 194535, 212220, 233442, 259380, 318330, 350163, 381996, 389070, 466884, 477495, 583605, 636660, 700326, 778140, 954990, 1050489, 1167210, 1400652, 1750815, 1909980, 2100978, 2334420, 3501630, 4201956, 5252445, 7003260, 10504890, 21009780]

約数ペア:

[(1, 21009780), (2, 10504890), (3, 7003260), (4, 5252445), (5, 4201956), (6, 3501630), (9, 2334420), (10, 2100978), (11, 1909980), (12, 1750815), (15, 1400652), (18, 1167210), (20, 1050489), (22, 954990), (27, 778140), (30, 700326), (33, 636660), (36, 583605), (44, 477495), (45, 466884), (54, 389070), (55, 381996), (60, 350163), (66, 318330), (81, 259380), (90, 233442), (99, 212220), (108, 194535), (110, 190998), (131, 160380), (132, 159165), (135, 155628), (162, 129690), (165, 127332), (180, 116721), (198, 106110), (220, 95499), (243, 86460), (262, 80190), (270, 77814), (297, 70740), (324, 64845), (330, 63666), (393, 53460), (396, 53055), (405, 51876), (486, 43230), (495, 42444), (524, 40095), (540, 38907), (594, 35370), (655, 32076), (660, 31833), (729, 28820), (786, 26730), (810, 25938), (891, 23580), (972, 21615), (990, 21222), (1179, 17820), (1188, 17685), (1215, 17292), (1310, 16038), (1441, 14580), (1458, 14410), (1485, 14148), (1572, 13365), (1620, 12969), (1782, 11790), (1965, 10692), (1980, 10611), (2358, 8910), (2430, 8646), (2620, 8019), (2673, 7860), (2882, 7290), (2916, 7205), (2970, 7074), (3537, 5940), (3564, 5895), (3645, 5764), (3930, 5346), (4323, 4860), (4455, 4716)]