21780808

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{167}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 50077440

約数和(自身を除く): 28296632

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 56, 68, 119, 136, 137, 167, 238, 274, 334, 476, 548, 668, 952, 959, 1096, 1169, 1336, 1918, 2329, 2338, 2839, 3836, 4658, 4676, 5678, 7672, 9316, 9352, 11356, 16303, 18632, 19873, 22712, 22879, 32606, 39746, 45758, 65212, 79492, 91516, 130424, 158984, 160153, 183032, 320306, 388943, 640612, 777886, 1281224, 1555772, 2722601, 3111544, 5445202, 10890404, 21780808]

約数ペア:

[(1, 21780808), (2, 10890404), (4, 5445202), (7, 3111544), (8, 2722601), (14, 1555772), (17, 1281224), (28, 777886), (34, 640612), (56, 388943), (68, 320306), (119, 183032), (136, 160153), (137, 158984), (167, 130424), (238, 91516), (274, 79492), (334, 65212), (476, 45758), (548, 39746), (668, 32606), (952, 22879), (959, 22712), (1096, 19873), (1169, 18632), (1336, 16303), (1918, 11356), (2329, 9352), (2338, 9316), (2839, 7672), (3836, 5678), (4658, 4676)]