19478540

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{353}}^1$

素因数の和:482

約数の個数: 48

約数和(自身を含む): 42819840

約数和(自身を除く): 23341300

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 89, 124, 155, 178, 310, 353, 356, 445, 620, 706, 890, 1412, 1765, 1780, 2759, 3530, 5518, 7060, 10943, 11036, 13795, 21886, 27590, 31417, 43772, 54715, 55180, 62834, 109430, 125668, 157085, 218860, 314170, 628340, 973927, 1947854, 3895708, 4869635, 9739270, 19478540]

約数ペア:

[(1, 19478540), (2, 9739270), (4, 4869635), (5, 3895708), (10, 1947854), (20, 973927), (31, 628340), (62, 314170), (89, 218860), (124, 157085), (155, 125668), (178, 109430), (310, 62834), (353, 55180), (356, 54715), (445, 43772), (620, 31417), (706, 27590), (890, 21886), (1412, 13795), (1765, 11036), (1780, 10943), (2759, 7060), (3530, 5518)]