20007351

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{479}}^1$

素因数の和:525

約数の個数: 64

約数和(自身を含む): 38707200

約数和(自身を除く): 18699849

約数列:

[1, 3, 7, 9, 13, 17, 21, 27, 39, 51, 63, 91, 117, 119, 153, 189, 221, 273, 351, 357, 459, 479, 663, 819, 1071, 1437, 1547, 1989, 2457, 3213, 3353, 4311, 4641, 5967, 6227, 8143, 10059, 12933, 13923, 18681, 24429, 30177, 41769, 43589, 56043, 57001, 73287, 90531, 105859, 130767, 168129, 171003, 219861, 317577, 392301, 513009, 741013, 952731, 1176903, 1539027, 2223039, 2858193, 6669117, 20007351]

約数ペア:

[(1, 20007351), (3, 6669117), (7, 2858193), (9, 2223039), (13, 1539027), (17, 1176903), (21, 952731), (27, 741013), (39, 513009), (51, 392301), (63, 317577), (91, 219861), (117, 171003), (119, 168129), (153, 130767), (189, 105859), (221, 90531), (273, 73287), (351, 57001), (357, 56043), (459, 43589), (479, 41769), (663, 30177), (819, 24429), (1071, 18681), (1437, 13923), (1547, 12933), (1989, 10059), (2457, 8143), (3213, 6227), (3353, 5967), (4311, 4641)]