21197820

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1231}}^1$

素因数の和:1291

約数の個数: 96

約数和(自身を含む): 69543936

約数和(自身を除く): 48346116

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 41, 42, 60, 70, 82, 84, 105, 123, 140, 164, 205, 210, 246, 287, 410, 420, 492, 574, 615, 820, 861, 1148, 1230, 1231, 1435, 1722, 2460, 2462, 2870, 3444, 3693, 4305, 4924, 5740, 6155, 7386, 8610, 8617, 12310, 14772, 17220, 17234, 18465, 24620, 25851, 34468, 36930, 43085, 50471, 51702, 73860, 86170, 100942, 103404, 129255, 151413, 172340, 201884, 252355, 258510, 302826, 353297, 504710, 517020, 605652, 706594, 757065, 1009420, 1059891, 1413188, 1514130, 1766485, 2119782, 3028260, 3532970, 4239564, 5299455, 7065940, 10598910, 21197820]

約数ペア:

[(1, 21197820), (2, 10598910), (3, 7065940), (4, 5299455), (5, 4239564), (6, 3532970), (7, 3028260), (10, 2119782), (12, 1766485), (14, 1514130), (15, 1413188), (20, 1059891), (21, 1009420), (28, 757065), (30, 706594), (35, 605652), (41, 517020), (42, 504710), (60, 353297), (70, 302826), (82, 258510), (84, 252355), (105, 201884), (123, 172340), (140, 151413), (164, 129255), (205, 103404), (210, 100942), (246, 86170), (287, 73860), (410, 51702), (420, 50471), (492, 43085), (574, 36930), (615, 34468), (820, 25851), (861, 24620), (1148, 18465), (1230, 17234), (1231, 17220), (1435, 14772), (1722, 12310), (2460, 8617), (2462, 8610), (2870, 7386), (3444, 6155), (3693, 5740), (4305, 4924)]