21828520

素因数分解:

$2^3\times 5^1\times 7^3\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:112

約数の個数: 128

約数和(自身を含む): 60192000

約数和(自身を除く): 38363480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 43, 49, 56, 70, 74, 86, 98, 140, 148, 172, 185, 196, 215, 245, 259, 280, 296, 301, 343, 344, 370, 392, 430, 490, 518, 602, 686, 740, 860, 980, 1036, 1204, 1295, 1372, 1480, 1505, 1591, 1715, 1720, 1813, 1960, 2072, 2107, 2408, 2590, 2744, 3010, 3182, 3430, 3626, 4214, 5180, 6020, 6364, 6860, 7252, 7955, 8428, 9065, 10360, 10535, 11137, 12040, 12691, 12728, 13720, 14504, 14749, 15910, 16856, 18130, 21070, 22274, 25382, 29498, 31820, 36260, 42140, 44548, 50764, 55685, 58996, 63455, 63640, 72520, 73745, 77959, 84280, 89096, 101528, 111370, 117992, 126910, 147490, 155918, 222740, 253820, 294980, 311836, 389795, 445480, 507640, 545713, 589960, 623672, 779590, 1091426, 1559180, 2182852, 2728565, 3118360, 4365704, 5457130, 10914260, 21828520]

約数ペア:

[(1, 21828520), (2, 10914260), (4, 5457130), (5, 4365704), (7, 3118360), (8, 2728565), (10, 2182852), (14, 1559180), (20, 1091426), (28, 779590), (35, 623672), (37, 589960), (40, 545713), (43, 507640), (49, 445480), (56, 389795), (70, 311836), (74, 294980), (86, 253820), (98, 222740), (140, 155918), (148, 147490), (172, 126910), (185, 117992), (196, 111370), (215, 101528), (245, 89096), (259, 84280), (280, 77959), (296, 73745), (301, 72520), (343, 63640), (344, 63455), (370, 58996), (392, 55685), (430, 50764), (490, 44548), (518, 42140), (602, 36260), (686, 31820), (740, 29498), (860, 25382), (980, 22274), (1036, 21070), (1204, 18130), (1295, 16856), (1372, 15910), (1480, 14749), (1505, 14504), (1591, 13720), (1715, 12728), (1720, 12691), (1813, 12040), (1960, 11137), (2072, 10535), (2107, 10360), (2408, 9065), (2590, 8428), (2744, 7955), (3010, 7252), (3182, 6860), (3430, 6364), (3626, 6020), (4214, 5180)]