20180781328

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{19387}}^1$

素因数の和:19544

約数の個数: 80

約数和(自身を含む): 42841275840

約数和(自身を除く): 22660494512

約数列:

[1, 2, 4, 8, 16, 17, 34, 43, 68, 86, 89, 136, 172, 178, 272, 344, 356, 688, 712, 731, 1424, 1462, 1513, 2924, 3026, 3827, 5848, 6052, 7654, 11696, 12104, 15308, 19387, 24208, 30616, 38774, 61232, 65059, 77548, 130118, 155096, 260236, 310192, 329579, 520472, 659158, 833641, 1040944, 1318316, 1667282, 1725443, 2636632, 3334564, 3450886, 5273264, 6669128, 6901772, 13338256, 13803544, 14171897, 27607088, 28343794, 29332531, 56687588, 58665062, 74194049, 113375176, 117330124, 148388098, 226750352, 234660248, 296776196, 469320496, 593552392, 1187104784, 1261298833, 2522597666, 5045195332, 10090390664, 20180781328]

約数ペア:

[(1, 20180781328), (2, 10090390664), (4, 5045195332), (8, 2522597666), (16, 1261298833), (17, 1187104784), (34, 593552392), (43, 469320496), (68, 296776196), (86, 234660248), (89, 226750352), (136, 148388098), (172, 117330124), (178, 113375176), (272, 74194049), (344, 58665062), (356, 56687588), (688, 29332531), (712, 28343794), (731, 27607088), (1424, 14171897), (1462, 13803544), (1513, 13338256), (2924, 6901772), (3026, 6669128), (3827, 5273264), (5848, 3450886), (6052, 3334564), (7654, 2636632), (11696, 1725443), (12104, 1667282), (15308, 1318316), (19387, 1040944), (24208, 833641), (30616, 659158), (38774, 520472), (61232, 329579), (65059, 310192), (77548, 260236), (130118, 155096)]