20985876

素因数分解:

$2^2\times 3^2\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:293

約数の個数: 72

約数和(自身を含む): 55211520

約数和(自身を除く): 34225644

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 47, 79, 94, 141, 157, 158, 188, 237, 282, 314, 316, 423, 471, 474, 564, 628, 711, 846, 942, 948, 1413, 1422, 1692, 1884, 2826, 2844, 3713, 5652, 7379, 7426, 11139, 12403, 14758, 14852, 22137, 22278, 24806, 29516, 33417, 37209, 44274, 44556, 49612, 66411, 66834, 74418, 88548, 111627, 132822, 133668, 148836, 223254, 265644, 446508, 582941, 1165882, 1748823, 2331764, 3497646, 5246469, 6995292, 10492938, 20985876]

約数ペア:

[(1, 20985876), (2, 10492938), (3, 6995292), (4, 5246469), (6, 3497646), (9, 2331764), (12, 1748823), (18, 1165882), (36, 582941), (47, 446508), (79, 265644), (94, 223254), (141, 148836), (157, 133668), (158, 132822), (188, 111627), (237, 88548), (282, 74418), (314, 66834), (316, 66411), (423, 49612), (471, 44556), (474, 44274), (564, 37209), (628, 33417), (711, 29516), (846, 24806), (942, 22278), (948, 22137), (1413, 14852), (1422, 14758), (1692, 12403), (1884, 11139), (2826, 7426), (2844, 7379), (3713, 5652)]