20493560

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 48345120

約数和(自身を除く): 27851560

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 61, 74, 122, 148, 185, 227, 244, 296, 305, 370, 454, 488, 610, 740, 908, 1135, 1220, 1480, 1816, 2257, 2270, 2440, 4514, 4540, 8399, 9028, 9080, 11285, 13847, 16798, 18056, 22570, 27694, 33596, 41995, 45140, 55388, 67192, 69235, 83990, 90280, 110776, 138470, 167980, 276940, 335960, 512339, 553880, 1024678, 2049356, 2561695, 4098712, 5123390, 10246780, 20493560]

約数ペア:

[(1, 20493560), (2, 10246780), (4, 5123390), (5, 4098712), (8, 2561695), (10, 2049356), (20, 1024678), (37, 553880), (40, 512339), (61, 335960), (74, 276940), (122, 167980), (148, 138470), (185, 110776), (227, 90280), (244, 83990), (296, 69235), (305, 67192), (370, 55388), (454, 45140), (488, 41995), (610, 33596), (740, 27694), (908, 22570), (1135, 18056), (1220, 16798), (1480, 13847), (1816, 11285), (2257, 9080), (2270, 9028), (2440, 8399), (4514, 4540)]