20041980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{401}}^1$

素因数の和:444

約数の個数: 144

約数和(自身を含む): 69291936

約数和(自身を除く): 49249956

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 49, 51, 60, 68, 70, 84, 85, 98, 102, 105, 119, 140, 147, 170, 196, 204, 210, 238, 245, 255, 294, 340, 357, 401, 420, 476, 490, 510, 588, 595, 714, 735, 802, 833, 980, 1020, 1190, 1203, 1428, 1470, 1604, 1666, 1785, 2005, 2380, 2406, 2499, 2807, 2940, 3332, 3570, 4010, 4165, 4812, 4998, 5614, 6015, 6817, 7140, 8020, 8330, 8421, 9996, 11228, 12030, 12495, 13634, 14035, 16660, 16842, 19649, 20451, 24060, 24990, 27268, 28070, 33684, 34085, 39298, 40902, 42105, 47719, 49980, 56140, 58947, 68170, 78596, 81804, 84210, 95438, 98245, 102255, 117894, 136340, 143157, 168420, 190876, 196490, 204510, 235788, 238595, 286314, 294735, 334033, 392980, 409020, 477190, 572628, 589470, 668066, 715785, 954380, 1002099, 1178940, 1336132, 1431570, 1670165, 2004198, 2863140, 3340330, 4008396, 5010495, 6680660, 10020990, 20041980]

約数ペア:

[(1, 20041980), (2, 10020990), (3, 6680660), (4, 5010495), (5, 4008396), (6, 3340330), (7, 2863140), (10, 2004198), (12, 1670165), (14, 1431570), (15, 1336132), (17, 1178940), (20, 1002099), (21, 954380), (28, 715785), (30, 668066), (34, 589470), (35, 572628), (42, 477190), (49, 409020), (51, 392980), (60, 334033), (68, 294735), (70, 286314), (84, 238595), (85, 235788), (98, 204510), (102, 196490), (105, 190876), (119, 168420), (140, 143157), (147, 136340), (170, 117894), (196, 102255), (204, 98245), (210, 95438), (238, 84210), (245, 81804), (255, 78596), (294, 68170), (340, 58947), (357, 56140), (401, 49980), (420, 47719), (476, 42105), (490, 40902), (510, 39298), (588, 34085), (595, 33684), (714, 28070), (735, 27268), (802, 24990), (833, 24060), (980, 20451), (1020, 19649), (1190, 16842), (1203, 16660), (1428, 14035), (1470, 13634), (1604, 12495), (1666, 12030), (1785, 11228), (2005, 9996), (2380, 8421), (2406, 8330), (2499, 8020), (2807, 7140), (2940, 6817), (3332, 6015), (3570, 5614), (4010, 4998), (4165, 4812)]