20765889920

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{613}}^1\times {\mathrm{1291}}^1$

素因数の和:1964

約数の個数: 128

約数和(自身を含む): 50976686880

約数和(自身を除く): 30210796960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 613, 640, 656, 820, 1226, 1291, 1312, 1640, 2452, 2582, 2624, 3065, 3280, 4904, 5164, 5248, 6130, 6455, 6560, 9808, 10328, 12260, 12910, 13120, 19616, 20656, 24520, 25133, 25820, 26240, 39232, 41312, 49040, 50266, 51640, 52931, 78464, 82624, 98080, 100532, 103280, 105862, 125665, 165248, 196160, 201064, 206560, 211724, 251330, 264655, 392320, 402128, 413120, 423448, 502660, 529310, 791383, 804256, 826240, 846896, 1005320, 1058620, 1582766, 1608512, 1693792, 2010640, 2117240, 3165532, 3217024, 3387584, 3956915, 4021280, 4234480, 6331064, 6775168, 7913830, 8042560, 8468960, 12662128, 15827660, 16085120, 16937920, 25324256, 31655320, 32446703, 33875840, 50648512, 63310640, 64893406, 101297024, 126621280, 129786812, 162233515, 253242560, 259573624, 324467030, 506485120, 519147248, 648934060, 1038294496, 1297868120, 2076588992, 2595736240, 4153177984, 5191472480, 10382944960, 20765889920]

約数ペア:

[(1, 20765889920), (2, 10382944960), (4, 5191472480), (5, 4153177984), (8, 2595736240), (10, 2076588992), (16, 1297868120), (20, 1038294496), (32, 648934060), (40, 519147248), (41, 506485120), (64, 324467030), (80, 259573624), (82, 253242560), (128, 162233515), (160, 129786812), (164, 126621280), (205, 101297024), (320, 64893406), (328, 63310640), (410, 50648512), (613, 33875840), (640, 32446703), (656, 31655320), (820, 25324256), (1226, 16937920), (1291, 16085120), (1312, 15827660), (1640, 12662128), (2452, 8468960), (2582, 8042560), (2624, 7913830), (3065, 6775168), (3280, 6331064), (4904, 4234480), (5164, 4021280), (5248, 3956915), (6130, 3387584), (6455, 3217024), (6560, 3165532), (9808, 2117240), (10328, 2010640), (12260, 1693792), (12910, 1608512), (13120, 1582766), (19616, 1058620), (20656, 1005320), (24520, 846896), (25133, 826240), (25820, 804256), (26240, 791383), (39232, 529310), (41312, 502660), (49040, 423448), (50266, 413120), (51640, 402128), (52931, 392320), (78464, 264655), (82624, 251330), (98080, 211724), (100532, 206560), (103280, 201064), (105862, 196160), (125665, 165248)]