16988660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{181}}^1$

素因数の和:241

約数の個数: 72

約数和(自身を含む): 40773096

約数和(自身を除く): 23784436

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 181, 190, 247, 260, 361, 362, 380, 494, 722, 724, 905, 988, 1235, 1444, 1805, 1810, 2353, 2470, 3439, 3610, 3620, 4693, 4706, 4940, 6878, 7220, 9386, 9412, 11765, 13756, 17195, 18772, 23465, 23530, 34390, 44707, 46930, 47060, 65341, 68780, 89414, 93860, 130682, 178828, 223535, 261364, 326705, 447070, 653410, 849433, 894140, 1306820, 1698866, 3397732, 4247165, 8494330, 16988660]

約数ペア:

[(1, 16988660), (2, 8494330), (4, 4247165), (5, 3397732), (10, 1698866), (13, 1306820), (19, 894140), (20, 849433), (26, 653410), (38, 447070), (52, 326705), (65, 261364), (76, 223535), (95, 178828), (130, 130682), (181, 93860), (190, 89414), (247, 68780), (260, 65341), (361, 47060), (362, 46930), (380, 44707), (494, 34390), (722, 23530), (724, 23465), (905, 18772), (988, 17195), (1235, 13756), (1444, 11765), (1805, 9412), (1810, 9386), (2353, 7220), (2470, 6878), (3439, 4940), (3610, 4706), (3620, 4693)]