21277744

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{571}}^1$

素因数の和:733

約数の個数: 40

約数和(自身を含む): 44046288

約数和(自身を除く): 22768544

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 137, 272, 274, 548, 571, 1096, 1142, 2192, 2284, 2329, 4568, 4658, 9136, 9316, 9707, 18632, 19414, 37264, 38828, 77656, 78227, 155312, 156454, 312908, 625816, 1251632, 1329859, 2659718, 5319436, 10638872, 21277744]

約数ペア:

[(1, 21277744), (2, 10638872), (4, 5319436), (8, 2659718), (16, 1329859), (17, 1251632), (34, 625816), (68, 312908), (136, 156454), (137, 155312), (272, 78227), (274, 77656), (548, 38828), (571, 37264), (1096, 19414), (1142, 18632), (2192, 9707), (2284, 9316), (2329, 9136), (4568, 4658)]