21978810

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{401}}^1$

素因数の和:453

約数の個数: 128

約数和(自身を含む): 69465600

約数和(自身を除く): 47486790

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 29, 30, 35, 42, 45, 54, 58, 63, 70, 87, 90, 105, 126, 135, 145, 174, 189, 203, 210, 261, 270, 290, 315, 378, 401, 406, 435, 522, 609, 630, 783, 802, 870, 945, 1015, 1203, 1218, 1305, 1566, 1827, 1890, 2005, 2030, 2406, 2610, 2807, 3045, 3609, 3654, 3915, 4010, 5481, 5614, 6015, 6090, 7218, 7830, 8421, 9135, 10827, 10962, 11629, 12030, 14035, 16842, 18045, 18270, 21654, 23258, 25263, 27405, 28070, 34887, 36090, 42105, 50526, 54135, 54810, 58145, 69774, 75789, 81403, 84210, 104661, 108270, 116290, 126315, 151578, 162806, 174435, 209322, 244209, 252630, 313983, 348870, 378945, 407015, 488418, 523305, 627966, 732627, 757890, 814030, 1046610, 1221045, 1465254, 1569915, 2197881, 2442090, 3139830, 3663135, 4395762, 7326270, 10989405, 21978810]

約数ペア:

[(1, 21978810), (2, 10989405), (3, 7326270), (5, 4395762), (6, 3663135), (7, 3139830), (9, 2442090), (10, 2197881), (14, 1569915), (15, 1465254), (18, 1221045), (21, 1046610), (27, 814030), (29, 757890), (30, 732627), (35, 627966), (42, 523305), (45, 488418), (54, 407015), (58, 378945), (63, 348870), (70, 313983), (87, 252630), (90, 244209), (105, 209322), (126, 174435), (135, 162806), (145, 151578), (174, 126315), (189, 116290), (203, 108270), (210, 104661), (261, 84210), (270, 81403), (290, 75789), (315, 69774), (378, 58145), (401, 54810), (406, 54135), (435, 50526), (522, 42105), (609, 36090), (630, 34887), (783, 28070), (802, 27405), (870, 25263), (945, 23258), (1015, 21654), (1203, 18270), (1218, 18045), (1305, 16842), (1566, 14035), (1827, 12030), (1890, 11629), (2005, 10962), (2030, 10827), (2406, 9135), (2610, 8421), (2807, 7830), (3045, 7218), (3609, 6090), (3654, 6015), (3915, 5614), (4010, 5481)]