19910709

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 37844352

約数和(自身を除く): 17933643

約数列:

[1, 3, 7, 9, 13, 21, 23, 39, 49, 63, 69, 91, 117, 147, 151, 161, 207, 273, 299, 441, 453, 483, 637, 819, 897, 1057, 1127, 1359, 1449, 1911, 1963, 2093, 2691, 3171, 3381, 3473, 5733, 5889, 6279, 7399, 9513, 10143, 10419, 13741, 14651, 17667, 18837, 22197, 24311, 31257, 41223, 43953, 45149, 66591, 72933, 96187, 123669, 131859, 135447, 170177, 218799, 288561, 316043, 406341, 510531, 865683, 948129, 1531593, 2212301, 2844387, 6636903, 19910709]

約数ペア:

[(1, 19910709), (3, 6636903), (7, 2844387), (9, 2212301), (13, 1531593), (21, 948129), (23, 865683), (39, 510531), (49, 406341), (63, 316043), (69, 288561), (91, 218799), (117, 170177), (147, 135447), (151, 131859), (161, 123669), (207, 96187), (273, 72933), (299, 66591), (441, 45149), (453, 43953), (483, 41223), (637, 31257), (819, 24311), (897, 22197), (1057, 18837), (1127, 17667), (1359, 14651), (1449, 13741), (1911, 10419), (1963, 10143), (2093, 9513), (2691, 7399), (3171, 6279), (3381, 5889), (3473, 5733)]