20688580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 48799296

約数和(自身を除く): 28110716

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 83, 103, 110, 121, 166, 206, 220, 242, 332, 412, 415, 484, 515, 605, 830, 913, 1030, 1133, 1210, 1660, 1826, 2060, 2266, 2420, 3652, 4532, 4565, 5665, 8549, 9130, 10043, 11330, 12463, 17098, 18260, 20086, 22660, 24926, 34196, 40172, 42745, 49852, 50215, 62315, 85490, 94039, 100430, 124630, 170980, 188078, 200860, 249260, 376156, 470195, 940390, 1034429, 1880780, 2068858, 4137716, 5172145, 10344290, 20688580]

約数ペア:

[(1, 20688580), (2, 10344290), (4, 5172145), (5, 4137716), (10, 2068858), (11, 1880780), (20, 1034429), (22, 940390), (44, 470195), (55, 376156), (83, 249260), (103, 200860), (110, 188078), (121, 170980), (166, 124630), (206, 100430), (220, 94039), (242, 85490), (332, 62315), (412, 50215), (415, 49852), (484, 42745), (515, 40172), (605, 34196), (830, 24926), (913, 22660), (1030, 20086), (1133, 18260), (1210, 17098), (1660, 12463), (1826, 11330), (2060, 10043), (2266, 9130), (2420, 8549), (3652, 5665), (4532, 4565)]