391601920

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:262

約数の個数: 144

約数和(自身を含む): 988968960

約数和(自身を除く): 597367040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 71, 80, 124, 128, 139, 142, 155, 160, 248, 256, 278, 284, 310, 320, 355, 496, 556, 568, 620, 640, 695, 710, 992, 1112, 1136, 1240, 1280, 1390, 1420, 1984, 2201, 2224, 2272, 2480, 2780, 2840, 3968, 4309, 4402, 4448, 4544, 4960, 5560, 5680, 7936, 8618, 8804, 8896, 9088, 9869, 9920, 11005, 11120, 11360, 17236, 17608, 17792, 18176, 19738, 19840, 21545, 22010, 22240, 22720, 34472, 35216, 35584, 39476, 39680, 43090, 44020, 44480, 45440, 49345, 68944, 70432, 78952, 86180, 88040, 88960, 90880, 98690, 137888, 140864, 157904, 172360, 176080, 177920, 197380, 275776, 281728, 305939, 315808, 344720, 352160, 394760, 551552, 563456, 611878, 631616, 689440, 704320, 789520, 1103104, 1223756, 1263232, 1378880, 1408640, 1529695, 1579040, 2447512, 2526464, 2757760, 2817280, 3059390, 3158080, 4895024, 5515520, 6118780, 6316160, 9790048, 12237560, 12632320, 19580096, 24475120, 39160192, 48950240, 78320384, 97900480, 195800960, 391601920]

約数ペア:

[(1, 391601920), (2, 195800960), (4, 97900480), (5, 78320384), (8, 48950240), (10, 39160192), (16, 24475120), (20, 19580096), (31, 12632320), (32, 12237560), (40, 9790048), (62, 6316160), (64, 6118780), (71, 5515520), (80, 4895024), (124, 3158080), (128, 3059390), (139, 2817280), (142, 2757760), (155, 2526464), (160, 2447512), (248, 1579040), (256, 1529695), (278, 1408640), (284, 1378880), (310, 1263232), (320, 1223756), (355, 1103104), (496, 789520), (556, 704320), (568, 689440), (620, 631616), (640, 611878), (695, 563456), (710, 551552), (992, 394760), (1112, 352160), (1136, 344720), (1240, 315808), (1280, 305939), (1390, 281728), (1420, 275776), (1984, 197380), (2201, 177920), (2224, 176080), (2272, 172360), (2480, 157904), (2780, 140864), (2840, 137888), (3968, 98690), (4309, 90880), (4402, 88960), (4448, 88040), (4544, 86180), (4960, 78952), (5560, 70432), (5680, 68944), (7936, 49345), (8618, 45440), (8804, 44480), (8896, 44020), (9088, 43090), (9869, 39680), (9920, 39476), (11005, 35584), (11120, 35216), (11360, 34472), (17236, 22720), (17608, 22240), (17792, 22010), (18176, 21545), (19738, 19840)]