19211140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1997}}^1$

素因数の和:2056

約数の個数: 48

約数和(自身を含む): 44643312

約数和(自身を除く): 25432172

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 37, 52, 65, 74, 130, 148, 185, 260, 370, 481, 740, 962, 1924, 1997, 2405, 3994, 4810, 7988, 9620, 9985, 19970, 25961, 39940, 51922, 73889, 103844, 129805, 147778, 259610, 295556, 369445, 519220, 738890, 960557, 1477780, 1921114, 3842228, 4802785, 9605570, 19211140]

約数ペア:

[(1, 19211140), (2, 9605570), (4, 4802785), (5, 3842228), (10, 1921114), (13, 1477780), (20, 960557), (26, 738890), (37, 519220), (52, 369445), (65, 295556), (74, 259610), (130, 147778), (148, 129805), (185, 103844), (260, 73889), (370, 51922), (481, 39940), (740, 25961), (962, 19970), (1924, 9985), (1997, 9620), (2405, 7988), (3994, 4810)]