21727020

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{179}}^1$

素因数の和:232

約数の個数: 144

約数和(自身を含む): 74269440

約数和(自身を除く): 52542420

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 51, 60, 68, 70, 84, 85, 102, 105, 119, 140, 170, 179, 204, 210, 238, 255, 289, 340, 357, 358, 420, 476, 510, 537, 578, 595, 714, 716, 867, 895, 1020, 1074, 1156, 1190, 1253, 1428, 1445, 1734, 1785, 1790, 2023, 2148, 2380, 2506, 2685, 2890, 3043, 3468, 3570, 3580, 3759, 4046, 4335, 5012, 5370, 5780, 6069, 6086, 6265, 7140, 7518, 8092, 8670, 9129, 10115, 10740, 12138, 12172, 12530, 15036, 15215, 17340, 18258, 18795, 20230, 21301, 24276, 25060, 30345, 30430, 36516, 37590, 40460, 42602, 45645, 51731, 60690, 60860, 63903, 75180, 85204, 91290, 103462, 106505, 121380, 127806, 155193, 182580, 206924, 213010, 255612, 258655, 310386, 319515, 362117, 426020, 517310, 620772, 639030, 724234, 775965, 1034620, 1086351, 1278060, 1448468, 1551930, 1810585, 2172702, 3103860, 3621170, 4345404, 5431755, 7242340, 10863510, 21727020]

約数ペア:

[(1, 21727020), (2, 10863510), (3, 7242340), (4, 5431755), (5, 4345404), (6, 3621170), (7, 3103860), (10, 2172702), (12, 1810585), (14, 1551930), (15, 1448468), (17, 1278060), (20, 1086351), (21, 1034620), (28, 775965), (30, 724234), (34, 639030), (35, 620772), (42, 517310), (51, 426020), (60, 362117), (68, 319515), (70, 310386), (84, 258655), (85, 255612), (102, 213010), (105, 206924), (119, 182580), (140, 155193), (170, 127806), (179, 121380), (204, 106505), (210, 103462), (238, 91290), (255, 85204), (289, 75180), (340, 63903), (357, 60860), (358, 60690), (420, 51731), (476, 45645), (510, 42602), (537, 40460), (578, 37590), (595, 36516), (714, 30430), (716, 30345), (867, 25060), (895, 24276), (1020, 21301), (1074, 20230), (1156, 18795), (1190, 18258), (1253, 17340), (1428, 15215), (1445, 15036), (1734, 12530), (1785, 12172), (1790, 12138), (2023, 10740), (2148, 10115), (2380, 9129), (2506, 8670), (2685, 8092), (2890, 7518), (3043, 7140), (3468, 6265), (3570, 6086), (3580, 6069), (3759, 5780), (4046, 5370), (4335, 5012)]