19816460

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{439}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 43538880

約数和(自身を除く): 23722420

約数列:

[1, 2, 4, 5, 10, 20, 37, 61, 74, 122, 148, 185, 244, 305, 370, 439, 610, 740, 878, 1220, 1756, 2195, 2257, 4390, 4514, 8780, 9028, 11285, 16243, 22570, 26779, 32486, 45140, 53558, 64972, 81215, 107116, 133895, 162430, 267790, 324860, 535580, 990823, 1981646, 3963292, 4954115, 9908230, 19816460]

約数ペア:

[(1, 19816460), (2, 9908230), (4, 4954115), (5, 3963292), (10, 1981646), (20, 990823), (37, 535580), (61, 324860), (74, 267790), (122, 162430), (148, 133895), (185, 107116), (244, 81215), (305, 64972), (370, 53558), (439, 45140), (610, 32486), (740, 26779), (878, 22570), (1220, 16243), (1756, 11285), (2195, 9028), (2257, 8780), (4390, 4514)]