21295360

素因数分解:

$2^8\times 5^1\times {\mathrm{127}}^1\times {\mathrm{131}}^1$

素因数の和:279

約数の個数: 72

約数和(自身を含む): 51803136

約数和(自身を除く): 30507776

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 131, 160, 254, 256, 262, 320, 508, 524, 635, 640, 655, 1016, 1048, 1270, 1280, 1310, 2032, 2096, 2540, 2620, 4064, 4192, 5080, 5240, 8128, 8384, 10160, 10480, 16256, 16637, 16768, 20320, 20960, 32512, 33274, 33536, 40640, 41920, 66548, 81280, 83185, 83840, 133096, 162560, 166370, 167680, 266192, 332740, 532384, 665480, 1064768, 1330960, 2129536, 2661920, 4259072, 5323840, 10647680, 21295360]

約数ペア:

[(1, 21295360), (2, 10647680), (4, 5323840), (5, 4259072), (8, 2661920), (10, 2129536), (16, 1330960), (20, 1064768), (32, 665480), (40, 532384), (64, 332740), (80, 266192), (127, 167680), (128, 166370), (131, 162560), (160, 133096), (254, 83840), (256, 83185), (262, 81280), (320, 66548), (508, 41920), (524, 40640), (635, 33536), (640, 33274), (655, 32512), (1016, 20960), (1048, 20320), (1270, 16768), (1280, 16637), (1310, 16256), (2032, 10480), (2096, 10160), (2540, 8384), (2620, 8128), (4064, 5240), (4192, 5080)]