19629980

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{647}}^1$

素因数の和:734

約数の個数: 48

約数和(自身を含む): 43436736

約数和(自身を除く): 23806756

約数列:

[1, 2, 4, 5, 10, 20, 37, 41, 74, 82, 148, 164, 185, 205, 370, 410, 647, 740, 820, 1294, 1517, 2588, 3034, 3235, 6068, 6470, 7585, 12940, 15170, 23939, 26527, 30340, 47878, 53054, 95756, 106108, 119695, 132635, 239390, 265270, 478780, 530540, 981499, 1962998, 3925996, 4907495, 9814990, 19629980]

約数ペア:

[(1, 19629980), (2, 9814990), (4, 4907495), (5, 3925996), (10, 1962998), (20, 981499), (37, 530540), (41, 478780), (74, 265270), (82, 239390), (148, 132635), (164, 119695), (185, 106108), (205, 95756), (370, 53054), (410, 47878), (647, 30340), (740, 26527), (820, 23939), (1294, 15170), (1517, 12940), (2588, 7585), (3034, 6470), (3235, 6068)]