20839500

素因数分解:

$2^2\times 3^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{421}}^1$

素因数の和:457

約数の個数: 144

約数和(自身を含む): 71888544

約数和(自身を除く): 51049044

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 25, 30, 33, 36, 44, 45, 50, 55, 60, 66, 75, 90, 99, 100, 110, 125, 132, 150, 165, 180, 198, 220, 225, 250, 275, 300, 330, 375, 396, 421, 450, 495, 500, 550, 660, 750, 825, 842, 900, 990, 1100, 1125, 1263, 1375, 1500, 1650, 1684, 1980, 2105, 2250, 2475, 2526, 2750, 3300, 3789, 4125, 4210, 4500, 4631, 4950, 5052, 5500, 6315, 7578, 8250, 8420, 9262, 9900, 10525, 12375, 12630, 13893, 15156, 16500, 18524, 18945, 21050, 23155, 24750, 25260, 27786, 31575, 37890, 41679, 42100, 46310, 49500, 52625, 55572, 63150, 69465, 75780, 83358, 92620, 94725, 105250, 115775, 126300, 138930, 157875, 166716, 189450, 208395, 210500, 231550, 277860, 315750, 347325, 378900, 416790, 463100, 473625, 578875, 631500, 694650, 833580, 947250, 1041975, 1157750, 1389300, 1736625, 1894500, 2083950, 2315500, 3473250, 4167900, 5209875, 6946500, 10419750, 20839500]

約数ペア:

[(1, 20839500), (2, 10419750), (3, 6946500), (4, 5209875), (5, 4167900), (6, 3473250), (9, 2315500), (10, 2083950), (11, 1894500), (12, 1736625), (15, 1389300), (18, 1157750), (20, 1041975), (22, 947250), (25, 833580), (30, 694650), (33, 631500), (36, 578875), (44, 473625), (45, 463100), (50, 416790), (55, 378900), (60, 347325), (66, 315750), (75, 277860), (90, 231550), (99, 210500), (100, 208395), (110, 189450), (125, 166716), (132, 157875), (150, 138930), (165, 126300), (180, 115775), (198, 105250), (220, 94725), (225, 92620), (250, 83358), (275, 75780), (300, 69465), (330, 63150), (375, 55572), (396, 52625), (421, 49500), (450, 46310), (495, 42100), (500, 41679), (550, 37890), (660, 31575), (750, 27786), (825, 25260), (842, 24750), (900, 23155), (990, 21050), (1100, 18945), (1125, 18524), (1263, 16500), (1375, 15156), (1500, 13893), (1650, 12630), (1684, 12375), (1980, 10525), (2105, 9900), (2250, 9262), (2475, 8420), (2526, 8250), (2750, 7578), (3300, 6315), (3789, 5500), (4125, 5052), (4210, 4950), (4500, 4631)]