19976940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:176

約数の個数: 144

約数和(自身を含む): 64864800

約数和(自身を除く): 44887860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 43, 45, 58, 60, 86, 87, 89, 90, 116, 129, 145, 172, 174, 178, 180, 215, 258, 261, 267, 290, 348, 356, 387, 430, 435, 445, 516, 522, 534, 580, 645, 774, 801, 860, 870, 890, 1044, 1068, 1247, 1290, 1305, 1335, 1548, 1602, 1740, 1780, 1935, 2494, 2580, 2581, 2610, 2670, 3204, 3741, 3827, 3870, 4005, 4988, 5162, 5220, 5340, 6235, 7482, 7654, 7740, 7743, 8010, 10324, 11223, 11481, 12470, 12905, 14964, 15308, 15486, 16020, 18705, 19135, 22446, 22962, 23229, 24940, 25810, 30972, 34443, 37410, 38270, 38715, 44892, 45924, 46458, 51620, 56115, 57405, 68886, 74820, 76540, 77430, 92916, 110983, 112230, 114810, 116145, 137772, 154860, 172215, 221966, 224460, 229620, 232290, 332949, 344430, 443932, 464580, 554915, 665898, 688860, 998847, 1109830, 1331796, 1664745, 1997694, 2219660, 3329490, 3995388, 4994235, 6658980, 9988470, 19976940]

約数ペア:

[(1, 19976940), (2, 9988470), (3, 6658980), (4, 4994235), (5, 3995388), (6, 3329490), (9, 2219660), (10, 1997694), (12, 1664745), (15, 1331796), (18, 1109830), (20, 998847), (29, 688860), (30, 665898), (36, 554915), (43, 464580), (45, 443932), (58, 344430), (60, 332949), (86, 232290), (87, 229620), (89, 224460), (90, 221966), (116, 172215), (129, 154860), (145, 137772), (172, 116145), (174, 114810), (178, 112230), (180, 110983), (215, 92916), (258, 77430), (261, 76540), (267, 74820), (290, 68886), (348, 57405), (356, 56115), (387, 51620), (430, 46458), (435, 45924), (445, 44892), (516, 38715), (522, 38270), (534, 37410), (580, 34443), (645, 30972), (774, 25810), (801, 24940), (860, 23229), (870, 22962), (890, 22446), (1044, 19135), (1068, 18705), (1247, 16020), (1290, 15486), (1305, 15308), (1335, 14964), (1548, 12905), (1602, 12470), (1740, 11481), (1780, 11223), (1935, 10324), (2494, 8010), (2580, 7743), (2581, 7740), (2610, 7654), (2670, 7482), (3204, 6235), (3741, 5340), (3827, 5220), (3870, 5162), (4005, 4988)]