21340400

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{1721}}^1$

素因数の和:1770

約数の個数: 60

約数和(自身を含む): 52954944

約数和(自身を除く): 31614544

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 40, 50, 62, 80, 100, 124, 155, 200, 248, 310, 400, 496, 620, 775, 1240, 1550, 1721, 2480, 3100, 3442, 6200, 6884, 8605, 12400, 13768, 17210, 27536, 34420, 43025, 53351, 68840, 86050, 106702, 137680, 172100, 213404, 266755, 344200, 426808, 533510, 688400, 853616, 1067020, 1333775, 2134040, 2667550, 4268080, 5335100, 10670200, 21340400]

約数ペア:

[(1, 21340400), (2, 10670200), (4, 5335100), (5, 4268080), (8, 2667550), (10, 2134040), (16, 1333775), (20, 1067020), (25, 853616), (31, 688400), (40, 533510), (50, 426808), (62, 344200), (80, 266755), (100, 213404), (124, 172100), (155, 137680), (200, 106702), (248, 86050), (310, 68840), (400, 53351), (496, 43025), (620, 34420), (775, 27536), (1240, 17210), (1550, 13768), (1721, 12400), (2480, 8605), (3100, 6884), (3442, 6200)]