21491680

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{619}}^1$

素因数の和:672

約数の個数: 96

約数和(自身を含む): 59996160

約数和(自身を除く): 38504480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 31, 32, 35, 40, 56, 62, 70, 80, 112, 124, 140, 155, 160, 217, 224, 248, 280, 310, 434, 496, 560, 619, 620, 868, 992, 1085, 1120, 1238, 1240, 1736, 2170, 2476, 2480, 3095, 3472, 4333, 4340, 4952, 4960, 6190, 6944, 8666, 8680, 9904, 12380, 17332, 17360, 19189, 19808, 21665, 24760, 34664, 34720, 38378, 43330, 49520, 69328, 76756, 86660, 95945, 99040, 134323, 138656, 153512, 173320, 191890, 268646, 307024, 346640, 383780, 537292, 614048, 671615, 693280, 767560, 1074584, 1343230, 1535120, 2149168, 2686460, 3070240, 4298336, 5372920, 10745840, 21491680]

約数ペア:

[(1, 21491680), (2, 10745840), (4, 5372920), (5, 4298336), (7, 3070240), (8, 2686460), (10, 2149168), (14, 1535120), (16, 1343230), (20, 1074584), (28, 767560), (31, 693280), (32, 671615), (35, 614048), (40, 537292), (56, 383780), (62, 346640), (70, 307024), (80, 268646), (112, 191890), (124, 173320), (140, 153512), (155, 138656), (160, 134323), (217, 99040), (224, 95945), (248, 86660), (280, 76756), (310, 69328), (434, 49520), (496, 43330), (560, 38378), (619, 34720), (620, 34664), (868, 24760), (992, 21665), (1085, 19808), (1120, 19189), (1238, 17360), (1240, 17332), (1736, 12380), (2170, 9904), (2476, 8680), (2480, 8666), (3095, 6944), (3472, 6190), (4333, 4960), (4340, 4952)]