21421620

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1$

素因数の和:406

約数の個数: 144

約数和(自身を含む): 73382400

約数和(自身を除く): 51960780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 31, 33, 36, 44, 45, 55, 60, 62, 66, 90, 93, 99, 110, 124, 132, 155, 165, 180, 186, 198, 220, 279, 310, 330, 341, 349, 372, 396, 465, 495, 558, 620, 660, 682, 698, 930, 990, 1023, 1047, 1116, 1364, 1395, 1396, 1705, 1745, 1860, 1980, 2046, 2094, 2790, 3069, 3141, 3410, 3490, 3839, 4092, 4188, 5115, 5235, 5580, 6138, 6282, 6820, 6980, 7678, 10230, 10470, 10819, 11517, 12276, 12564, 15345, 15356, 15705, 19195, 20460, 20940, 21638, 23034, 30690, 31410, 32457, 34551, 38390, 43276, 46068, 54095, 57585, 61380, 62820, 64914, 69102, 76780, 97371, 108190, 115170, 119009, 129828, 138204, 162285, 172755, 194742, 216380, 230340, 238018, 324570, 345510, 357027, 389484, 476036, 486855, 595045, 649140, 691020, 714054, 973710, 1071081, 1190090, 1428108, 1785135, 1947420, 2142162, 2380180, 3570270, 4284324, 5355405, 7140540, 10710810, 21421620]

約数ペア:

[(1, 21421620), (2, 10710810), (3, 7140540), (4, 5355405), (5, 4284324), (6, 3570270), (9, 2380180), (10, 2142162), (11, 1947420), (12, 1785135), (15, 1428108), (18, 1190090), (20, 1071081), (22, 973710), (30, 714054), (31, 691020), (33, 649140), (36, 595045), (44, 486855), (45, 476036), (55, 389484), (60, 357027), (62, 345510), (66, 324570), (90, 238018), (93, 230340), (99, 216380), (110, 194742), (124, 172755), (132, 162285), (155, 138204), (165, 129828), (180, 119009), (186, 115170), (198, 108190), (220, 97371), (279, 76780), (310, 69102), (330, 64914), (341, 62820), (349, 61380), (372, 57585), (396, 54095), (465, 46068), (495, 43276), (558, 38390), (620, 34551), (660, 32457), (682, 31410), (698, 30690), (930, 23034), (990, 21638), (1023, 20940), (1047, 20460), (1116, 19195), (1364, 15705), (1395, 15356), (1396, 15345), (1705, 12564), (1745, 12276), (1860, 11517), (1980, 10819), (2046, 10470), (2094, 10230), (2790, 7678), (3069, 6980), (3141, 6820), (3410, 6282), (3490, 6138), (3839, 5580), (4092, 5235), (4188, 5115)]