21681288

素因数分解:

$2^3\times 3^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:251

約数の個数: 96

約数和(自身を含む): 61776000

約数和(自身を除く): 40094712

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 43, 47, 72, 86, 94, 129, 141, 149, 172, 188, 258, 282, 298, 344, 376, 387, 423, 447, 516, 564, 596, 774, 846, 894, 1032, 1128, 1192, 1341, 1548, 1692, 1788, 2021, 2682, 3096, 3384, 3576, 4042, 5364, 6063, 6407, 7003, 8084, 10728, 12126, 12814, 14006, 16168, 18189, 19221, 21009, 24252, 25628, 28012, 36378, 38442, 42018, 48504, 51256, 56024, 57663, 63027, 72756, 76884, 84036, 115326, 126054, 145512, 153768, 168072, 230652, 252108, 301129, 461304, 504216, 602258, 903387, 1204516, 1806774, 2409032, 2710161, 3613548, 5420322, 7227096, 10840644, 21681288]

約数ペア:

[(1, 21681288), (2, 10840644), (3, 7227096), (4, 5420322), (6, 3613548), (8, 2710161), (9, 2409032), (12, 1806774), (18, 1204516), (24, 903387), (36, 602258), (43, 504216), (47, 461304), (72, 301129), (86, 252108), (94, 230652), (129, 168072), (141, 153768), (149, 145512), (172, 126054), (188, 115326), (258, 84036), (282, 76884), (298, 72756), (344, 63027), (376, 57663), (387, 56024), (423, 51256), (447, 48504), (516, 42018), (564, 38442), (596, 36378), (774, 28012), (846, 25628), (894, 24252), (1032, 21009), (1128, 19221), (1192, 18189), (1341, 16168), (1548, 14006), (1692, 12814), (1788, 12126), (2021, 10728), (2682, 8084), (3096, 7003), (3384, 6407), (3576, 6063), (4042, 5364)]