256781680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{2203}}^1$

素因数の和:2294

約数の個数: 80

約数和(自身を含む): 629673984

約数和(自身を除く): 372892304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 47, 62, 80, 94, 124, 155, 188, 235, 248, 310, 376, 470, 496, 620, 752, 940, 1240, 1457, 1880, 2203, 2480, 2914, 3760, 4406, 5828, 7285, 8812, 11015, 11656, 14570, 17624, 22030, 23312, 29140, 35248, 44060, 58280, 68293, 88120, 103541, 116560, 136586, 176240, 207082, 273172, 341465, 414164, 517705, 546344, 682930, 828328, 1035410, 1092688, 1365860, 1656656, 2070820, 2731720, 3209771, 4141640, 5463440, 6419542, 8283280, 12839084, 16048855, 25678168, 32097710, 51356336, 64195420, 128390840, 256781680]

約数ペア:

[(1, 256781680), (2, 128390840), (4, 64195420), (5, 51356336), (8, 32097710), (10, 25678168), (16, 16048855), (20, 12839084), (31, 8283280), (40, 6419542), (47, 5463440), (62, 4141640), (80, 3209771), (94, 2731720), (124, 2070820), (155, 1656656), (188, 1365860), (235, 1092688), (248, 1035410), (310, 828328), (376, 682930), (470, 546344), (496, 517705), (620, 414164), (752, 341465), (940, 273172), (1240, 207082), (1457, 176240), (1880, 136586), (2203, 116560), (2480, 103541), (2914, 88120), (3760, 68293), (4406, 58280), (5828, 44060), (7285, 35248), (8812, 29140), (11015, 23312), (11656, 22030), (14570, 17624)]