20512142740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{569}}^1\times {\mathrm{4993}}^1$

素因数の和:5609

約数の個数: 72

約数和(自身を含む): 45550973160

約数和(自身を除く): 25038830420

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 569, 722, 1138, 1444, 1805, 2276, 2845, 3610, 4993, 5690, 7220, 9986, 10811, 11380, 19972, 21622, 24965, 43244, 49930, 54055, 94867, 99860, 108110, 189734, 205409, 216220, 379468, 410818, 474335, 821636, 948670, 1027045, 1802473, 1897340, 2054090, 2841017, 3604946, 4108180, 5682034, 7209892, 9012365, 11364068, 14205085, 18024730, 28410170, 36049460, 53979323, 56820340, 107958646, 215917292, 269896615, 539793230, 1025607137, 1079586460, 2051214274, 4102428548, 5128035685, 10256071370, 20512142740]

約数ペア:

[(1, 20512142740), (2, 10256071370), (4, 5128035685), (5, 4102428548), (10, 2051214274), (19, 1079586460), (20, 1025607137), (38, 539793230), (76, 269896615), (95, 215917292), (190, 107958646), (361, 56820340), (380, 53979323), (569, 36049460), (722, 28410170), (1138, 18024730), (1444, 14205085), (1805, 11364068), (2276, 9012365), (2845, 7209892), (3610, 5682034), (4993, 4108180), (5690, 3604946), (7220, 2841017), (9986, 2054090), (10811, 1897340), (11380, 1802473), (19972, 1027045), (21622, 948670), (24965, 821636), (43244, 474335), (49930, 410818), (54055, 379468), (94867, 216220), (99860, 205409), (108110, 189734)]