199819998

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:267

約数の個数: 144

約数和(自身を含む): 547762176

約数和(自身を除く): 347942178

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 19, 21, 23, 38, 42, 46, 57, 63, 69, 114, 126, 133, 138, 161, 171, 191, 207, 266, 322, 342, 361, 382, 399, 414, 437, 483, 573, 722, 798, 874, 966, 1083, 1146, 1197, 1311, 1337, 1449, 1719, 2166, 2394, 2527, 2622, 2674, 2898, 3059, 3249, 3438, 3629, 3933, 4011, 4393, 5054, 6118, 6498, 7258, 7581, 7866, 8022, 8303, 8786, 9177, 10887, 12033, 13179, 15162, 16606, 18354, 21774, 22743, 24066, 24909, 25403, 26358, 27531, 30751, 32661, 39537, 45486, 49818, 50806, 55062, 58121, 61502, 65322, 68951, 74727, 76209, 79074, 83467, 92253, 116242, 137902, 149454, 152418, 166934, 174363, 184506, 206853, 228627, 250401, 276759, 348726, 413706, 457254, 482657, 500802, 523089, 553518, 584269, 620559, 751203, 965314, 1046178, 1168538, 1241118, 1447971, 1502406, 1585873, 1752807, 2895942, 3171746, 3505614, 4343913, 4757619, 5258421, 8687826, 9515238, 10516842, 11101111, 14272857, 22202222, 28545714, 33303333, 66606666, 99909999, 199819998]

約数ペア:

[(1, 199819998), (2, 99909999), (3, 66606666), (6, 33303333), (7, 28545714), (9, 22202222), (14, 14272857), (18, 11101111), (19, 10516842), (21, 9515238), (23, 8687826), (38, 5258421), (42, 4757619), (46, 4343913), (57, 3505614), (63, 3171746), (69, 2895942), (114, 1752807), (126, 1585873), (133, 1502406), (138, 1447971), (161, 1241118), (171, 1168538), (191, 1046178), (207, 965314), (266, 751203), (322, 620559), (342, 584269), (361, 553518), (382, 523089), (399, 500802), (414, 482657), (437, 457254), (483, 413706), (573, 348726), (722, 276759), (798, 250401), (874, 228627), (966, 206853), (1083, 184506), (1146, 174363), (1197, 166934), (1311, 152418), (1337, 149454), (1449, 137902), (1719, 116242), (2166, 92253), (2394, 83467), (2527, 79074), (2622, 76209), (2674, 74727), (2898, 68951), (3059, 65322), (3249, 61502), (3438, 58121), (3629, 55062), (3933, 50806), (4011, 49818), (4393, 45486), (5054, 39537), (6118, 32661), (6498, 30751), (7258, 27531), (7581, 26358), (7866, 25403), (8022, 24909), (8303, 24066), (8786, 22743), (9177, 21774), (10887, 18354), (12033, 16606), (13179, 15162)]