19983700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{491}}^1$

素因数の和:553

約数の個数: 72

約数和(自身を含む): 48684384

約数和(自身を除く): 28700684

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 37, 44, 50, 55, 74, 100, 110, 148, 185, 220, 275, 370, 407, 491, 550, 740, 814, 925, 982, 1100, 1628, 1850, 1964, 2035, 2455, 3700, 4070, 4910, 5401, 8140, 9820, 10175, 10802, 12275, 18167, 20350, 21604, 24550, 27005, 36334, 40700, 49100, 54010, 72668, 90835, 108020, 135025, 181670, 199837, 270050, 363340, 399674, 454175, 540100, 799348, 908350, 999185, 1816700, 1998370, 3996740, 4995925, 9991850, 19983700]

約数ペア:

[(1, 19983700), (2, 9991850), (4, 4995925), (5, 3996740), (10, 1998370), (11, 1816700), (20, 999185), (22, 908350), (25, 799348), (37, 540100), (44, 454175), (50, 399674), (55, 363340), (74, 270050), (100, 199837), (110, 181670), (148, 135025), (185, 108020), (220, 90835), (275, 72668), (370, 54010), (407, 49100), (491, 40700), (550, 36334), (740, 27005), (814, 24550), (925, 21604), (982, 20350), (1100, 18167), (1628, 12275), (1850, 10802), (1964, 10175), (2035, 9820), (2455, 8140), (3700, 5401), (4070, 4910)]