21787258905

素因数分解:

$3^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{509}}^1\times {\mathrm{6217}}^1$

素因数の和:6760

約数の個数: 80

約数和(自身を含む): 41440980240

約数和(自身を除く): 19653721335

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 135, 153, 255, 405, 459, 509, 765, 1377, 1527, 2295, 2545, 4581, 6217, 6885, 7635, 8653, 13743, 18651, 22905, 25959, 31085, 41229, 43265, 55953, 68715, 77877, 93255, 105689, 129795, 167859, 206145, 233631, 279765, 317067, 389385, 503577, 528445, 700893, 839295, 951201, 1168155, 1585335, 2517885, 2853603, 3164453, 3504465, 4756005, 8560809, 9493359, 14268015, 15822265, 28480077, 42804045, 47466795, 53795701, 85440231, 142400385, 161387103, 256320693, 268978505, 427201155, 484161309, 806935515, 1281603465, 1452483927, 2420806545, 4357451781, 7262419635, 21787258905]

約数ペア:

[(1, 21787258905), (3, 7262419635), (5, 4357451781), (9, 2420806545), (15, 1452483927), (17, 1281603465), (27, 806935515), (45, 484161309), (51, 427201155), (81, 268978505), (85, 256320693), (135, 161387103), (153, 142400385), (255, 85440231), (405, 53795701), (459, 47466795), (509, 42804045), (765, 28480077), (1377, 15822265), (1527, 14268015), (2295, 9493359), (2545, 8560809), (4581, 4756005), (6217, 3504465), (6885, 3164453), (7635, 2853603), (8653, 2517885), (13743, 1585335), (18651, 1168155), (22905, 951201), (25959, 839295), (31085, 700893), (41229, 528445), (43265, 503577), (55953, 389385), (68715, 317067), (77877, 279765), (93255, 233631), (105689, 206145), (129795, 167859)]