21983180

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{487}}^1$

素因数の和:594

約数の個数: 48

約数和(自身を含む): 48288576

約数和(自身を除く): 26305396

約数列:

[1, 2, 4, 5, 10, 20, 37, 61, 74, 122, 148, 185, 244, 305, 370, 487, 610, 740, 974, 1220, 1948, 2257, 2435, 4514, 4870, 9028, 9740, 11285, 18019, 22570, 29707, 36038, 45140, 59414, 72076, 90095, 118828, 148535, 180190, 297070, 360380, 594140, 1099159, 2198318, 4396636, 5495795, 10991590, 21983180]

約数ペア:

[(1, 21983180), (2, 10991590), (4, 5495795), (5, 4396636), (10, 2198318), (20, 1099159), (37, 594140), (61, 360380), (74, 297070), (122, 180190), (148, 148535), (185, 118828), (244, 90095), (305, 72076), (370, 59414), (487, 45140), (610, 36038), (740, 29707), (974, 22570), (1220, 18019), (1948, 11285), (2257, 9740), (2435, 9028), (4514, 4870)]