1780020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1$

素因数の和:86

約数の個数: 144

約数和(自身を含む): 6289920

約数和(自身を除く): 4509900

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 29, 30, 31, 33, 36, 44, 45, 55, 58, 60, 62, 66, 87, 90, 93, 99, 110, 116, 124, 132, 145, 155, 165, 174, 180, 186, 198, 220, 261, 279, 290, 310, 319, 330, 341, 348, 372, 396, 435, 465, 495, 522, 558, 580, 620, 638, 660, 682, 870, 899, 930, 957, 990, 1023, 1044, 1116, 1276, 1305, 1364, 1395, 1595, 1705, 1740, 1798, 1860, 1914, 1980, 2046, 2610, 2697, 2790, 2871, 3069, 3190, 3410, 3596, 3828, 4092, 4495, 4785, 5115, 5220, 5394, 5580, 5742, 6138, 6380, 6820, 8091, 8990, 9570, 9889, 10230, 10788, 11484, 12276, 13485, 14355, 15345, 16182, 17980, 19140, 19778, 20460, 26970, 28710, 29667, 30690, 32364, 39556, 40455, 49445, 53940, 57420, 59334, 61380, 80910, 89001, 98890, 118668, 148335, 161820, 178002, 197780, 296670, 356004, 445005, 593340, 890010, 1780020]

約数ペア:

[(1, 1780020), (2, 890010), (3, 593340), (4, 445005), (5, 356004), (6, 296670), (9, 197780), (10, 178002), (11, 161820), (12, 148335), (15, 118668), (18, 98890), (20, 89001), (22, 80910), (29, 61380), (30, 59334), (31, 57420), (33, 53940), (36, 49445), (44, 40455), (45, 39556), (55, 32364), (58, 30690), (60, 29667), (62, 28710), (66, 26970), (87, 20460), (90, 19778), (93, 19140), (99, 17980), (110, 16182), (116, 15345), (124, 14355), (132, 13485), (145, 12276), (155, 11484), (165, 10788), (174, 10230), (180, 9889), (186, 9570), (198, 8990), (220, 8091), (261, 6820), (279, 6380), (290, 6138), (310, 5742), (319, 5580), (330, 5394), (341, 5220), (348, 5115), (372, 4785), (396, 4495), (435, 4092), (465, 3828), (495, 3596), (522, 3410), (558, 3190), (580, 3069), (620, 2871), (638, 2790), (660, 2697), (682, 2610), (870, 2046), (899, 1980), (930, 1914), (957, 1860), (990, 1798), (1023, 1740), (1044, 1705), (1116, 1595), (1276, 1395), (1305, 1364)]