19781080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 50465520

約数和(自身を除く): 30684440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 61, 67, 88, 110, 121, 122, 134, 220, 242, 244, 268, 305, 335, 440, 484, 488, 536, 605, 610, 670, 671, 737, 968, 1210, 1220, 1340, 1342, 1474, 2420, 2440, 2680, 2684, 2948, 3355, 3685, 4087, 4840, 5368, 5896, 6710, 7370, 7381, 8107, 8174, 13420, 14740, 14762, 16214, 16348, 20435, 26840, 29480, 29524, 32428, 32696, 36905, 40535, 40870, 44957, 59048, 64856, 73810, 81070, 81740, 89914, 147620, 162140, 163480, 179828, 224785, 295240, 324280, 359656, 449570, 494527, 899140, 989054, 1798280, 1978108, 2472635, 3956216, 4945270, 9890540, 19781080]

約数ペア:

[(1, 19781080), (2, 9890540), (4, 4945270), (5, 3956216), (8, 2472635), (10, 1978108), (11, 1798280), (20, 989054), (22, 899140), (40, 494527), (44, 449570), (55, 359656), (61, 324280), (67, 295240), (88, 224785), (110, 179828), (121, 163480), (122, 162140), (134, 147620), (220, 89914), (242, 81740), (244, 81070), (268, 73810), (305, 64856), (335, 59048), (440, 44957), (484, 40870), (488, 40535), (536, 36905), (605, 32696), (610, 32428), (670, 29524), (671, 29480), (737, 26840), (968, 20435), (1210, 16348), (1220, 16214), (1340, 14762), (1342, 14740), (1474, 13420), (2420, 8174), (2440, 8107), (2680, 7381), (2684, 7370), (2948, 6710), (3355, 5896), (3685, 5368), (4087, 4840)]