19974780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{191}}^1$

素因数の和:296

約数の個数: 144

約数和(自身を含む): 70447104

約数和(自身を除く): 50472324

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 83, 84, 90, 105, 126, 140, 166, 180, 191, 210, 249, 252, 315, 332, 382, 415, 420, 498, 573, 581, 630, 747, 764, 830, 955, 996, 1146, 1162, 1245, 1260, 1337, 1494, 1660, 1719, 1743, 1910, 2292, 2324, 2490, 2674, 2865, 2905, 2988, 3438, 3486, 3735, 3820, 4011, 4980, 5229, 5348, 5730, 5810, 6685, 6876, 6972, 7470, 8022, 8595, 8715, 10458, 11460, 11620, 12033, 13370, 14940, 15853, 16044, 17190, 17430, 20055, 20916, 24066, 26145, 26740, 31706, 34380, 34860, 40110, 47559, 48132, 52290, 60165, 63412, 79265, 80220, 95118, 104580, 110971, 120330, 142677, 158530, 190236, 221942, 237795, 240660, 285354, 317060, 332913, 443884, 475590, 554855, 570708, 665826, 713385, 951180, 998739, 1109710, 1331652, 1426770, 1664565, 1997478, 2219420, 2853540, 3329130, 3994956, 4993695, 6658260, 9987390, 19974780]

約数ペア:

[(1, 19974780), (2, 9987390), (3, 6658260), (4, 4993695), (5, 3994956), (6, 3329130), (7, 2853540), (9, 2219420), (10, 1997478), (12, 1664565), (14, 1426770), (15, 1331652), (18, 1109710), (20, 998739), (21, 951180), (28, 713385), (30, 665826), (35, 570708), (36, 554855), (42, 475590), (45, 443884), (60, 332913), (63, 317060), (70, 285354), (83, 240660), (84, 237795), (90, 221942), (105, 190236), (126, 158530), (140, 142677), (166, 120330), (180, 110971), (191, 104580), (210, 95118), (249, 80220), (252, 79265), (315, 63412), (332, 60165), (382, 52290), (415, 48132), (420, 47559), (498, 40110), (573, 34860), (581, 34380), (630, 31706), (747, 26740), (764, 26145), (830, 24066), (955, 20916), (996, 20055), (1146, 17430), (1162, 17190), (1245, 16044), (1260, 15853), (1337, 14940), (1494, 13370), (1660, 12033), (1719, 11620), (1743, 11460), (1910, 10458), (2292, 8715), (2324, 8595), (2490, 8022), (2674, 7470), (2865, 6972), (2905, 6876), (2988, 6685), (3438, 5810), (3486, 5730), (3735, 5348), (3820, 5229), (4011, 4980)]