18509140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{277}}^1$

素因数の和:556

約数の個数: 48

約数和(自身を含む): 42173712

約数和(自身を除く): 23664572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 257, 260, 277, 514, 554, 1028, 1108, 1285, 1385, 2570, 2770, 3341, 3601, 5140, 5540, 6682, 7202, 13364, 14404, 16705, 18005, 33410, 36010, 66820, 71189, 72020, 142378, 284756, 355945, 711890, 925457, 1423780, 1850914, 3701828, 4627285, 9254570, 18509140]

約数ペア:

[(1, 18509140), (2, 9254570), (4, 4627285), (5, 3701828), (10, 1850914), (13, 1423780), (20, 925457), (26, 711890), (52, 355945), (65, 284756), (130, 142378), (257, 72020), (260, 71189), (277, 66820), (514, 36010), (554, 33410), (1028, 18005), (1108, 16705), (1285, 14404), (1385, 13364), (2570, 7202), (2770, 6682), (3341, 5540), (3601, 5140)]