20435940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^3\times {\mathrm{331}}^1$

素因数の和:367

約数の個数: 144

約数和(自身を含む): 72508800

約数和(自身を除く): 52072860

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 49, 60, 63, 70, 84, 90, 98, 105, 126, 140, 147, 180, 196, 210, 245, 252, 294, 315, 331, 343, 420, 441, 490, 588, 630, 662, 686, 735, 882, 980, 993, 1029, 1260, 1324, 1372, 1470, 1655, 1715, 1764, 1986, 2058, 2205, 2317, 2940, 2979, 3087, 3310, 3430, 3972, 4116, 4410, 4634, 4965, 5145, 5958, 6174, 6620, 6860, 6951, 8820, 9268, 9930, 10290, 11585, 11916, 12348, 13902, 14895, 15435, 16219, 19860, 20580, 20853, 23170, 27804, 29790, 30870, 32438, 34755, 41706, 46340, 48657, 59580, 61740, 64876, 69510, 81095, 83412, 97314, 104265, 113533, 139020, 145971, 162190, 194628, 208530, 227066, 243285, 291942, 324380, 340599, 417060, 454132, 486570, 567665, 583884, 681198, 729855, 973140, 1021797, 1135330, 1362396, 1459710, 1702995, 2043594, 2270660, 2919420, 3405990, 4087188, 5108985, 6811980, 10217970, 20435940]

約数ペア:

[(1, 20435940), (2, 10217970), (3, 6811980), (4, 5108985), (5, 4087188), (6, 3405990), (7, 2919420), (9, 2270660), (10, 2043594), (12, 1702995), (14, 1459710), (15, 1362396), (18, 1135330), (20, 1021797), (21, 973140), (28, 729855), (30, 681198), (35, 583884), (36, 567665), (42, 486570), (45, 454132), (49, 417060), (60, 340599), (63, 324380), (70, 291942), (84, 243285), (90, 227066), (98, 208530), (105, 194628), (126, 162190), (140, 145971), (147, 139020), (180, 113533), (196, 104265), (210, 97314), (245, 83412), (252, 81095), (294, 69510), (315, 64876), (331, 61740), (343, 59580), (420, 48657), (441, 46340), (490, 41706), (588, 34755), (630, 32438), (662, 30870), (686, 29790), (735, 27804), (882, 23170), (980, 20853), (993, 20580), (1029, 19860), (1260, 16219), (1324, 15435), (1372, 14895), (1470, 13902), (1655, 12348), (1715, 11916), (1764, 11585), (1986, 10290), (2058, 9930), (2205, 9268), (2317, 8820), (2940, 6951), (2979, 6860), (3087, 6620), (3310, 6174), (3430, 5958), (3972, 5145), (4116, 4965), (4410, 4634)]