51147520

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1289}}^1$

素因数の和:1341

約数の個数: 72

約数和(自身を含む): 126564480

約数和(自身を除く): 75416960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1289, 1984, 2480, 2578, 3968, 4960, 5156, 6445, 7936, 9920, 10312, 12890, 19840, 20624, 25780, 39680, 39959, 41248, 51560, 79918, 82496, 103120, 159836, 164992, 199795, 206240, 319672, 329984, 399590, 412480, 639344, 799180, 824960, 1278688, 1598360, 1649920, 2557376, 3196720, 5114752, 6393440, 10229504, 12786880, 25573760, 51147520]

約数ペア:

[(1, 51147520), (2, 25573760), (4, 12786880), (5, 10229504), (8, 6393440), (10, 5114752), (16, 3196720), (20, 2557376), (31, 1649920), (32, 1598360), (40, 1278688), (62, 824960), (64, 799180), (80, 639344), (124, 412480), (128, 399590), (155, 329984), (160, 319672), (248, 206240), (256, 199795), (310, 164992), (320, 159836), (496, 103120), (620, 82496), (640, 79918), (992, 51560), (1240, 41248), (1280, 39959), (1289, 39680), (1984, 25780), (2480, 20624), (2578, 19840), (3968, 12890), (4960, 10312), (5156, 9920), (6445, 7936)]