21065210

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:275

約数の個数: 48

約数和(自身を含む): 41577624

約数和(自身を除く): 20512414

約数列:

[1, 2, 5, 10, 17, 34, 37, 74, 85, 170, 185, 197, 289, 370, 394, 578, 629, 985, 1258, 1445, 1970, 2890, 3145, 3349, 6290, 6698, 7289, 10693, 14578, 16745, 21386, 33490, 36445, 53465, 56933, 72890, 106930, 113866, 123913, 247826, 284665, 569330, 619565, 1239130, 2106521, 4213042, 10532605, 21065210]

約数ペア:

[(1, 21065210), (2, 10532605), (5, 4213042), (10, 2106521), (17, 1239130), (34, 619565), (37, 569330), (74, 284665), (85, 247826), (170, 123913), (185, 113866), (197, 106930), (289, 72890), (370, 56933), (394, 53465), (578, 36445), (629, 33490), (985, 21386), (1258, 16745), (1445, 14578), (1970, 10693), (2890, 7289), (3145, 6698), (3349, 6290)]