20981730

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{293}}^1$

素因数の和:352

約数の個数: 128

約数和(自身を含む): 65028096

約数和(自身を除く): 44046366

約数列:

[1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 21, 22, 30, 31, 33, 35, 42, 55, 62, 66, 70, 77, 93, 105, 110, 154, 155, 165, 186, 210, 217, 231, 293, 310, 330, 341, 385, 434, 462, 465, 586, 651, 682, 770, 879, 930, 1023, 1085, 1155, 1302, 1465, 1705, 1758, 2046, 2051, 2170, 2310, 2387, 2930, 3223, 3255, 3410, 4102, 4395, 4774, 5115, 6153, 6446, 6510, 7161, 8790, 9083, 9669, 10230, 10255, 11935, 12306, 14322, 16115, 18166, 19338, 20510, 22561, 23870, 27249, 30765, 32230, 35805, 45122, 45415, 48345, 54498, 61530, 63581, 67683, 71610, 90830, 96690, 99913, 112805, 127162, 135366, 136245, 190743, 199826, 225610, 272490, 299739, 317905, 338415, 381486, 499565, 599478, 635810, 676830, 699391, 953715, 999130, 1398782, 1498695, 1907430, 2098173, 2997390, 3496955, 4196346, 6993910, 10490865, 20981730]

約数ペア:

[(1, 20981730), (2, 10490865), (3, 6993910), (5, 4196346), (6, 3496955), (7, 2997390), (10, 2098173), (11, 1907430), (14, 1498695), (15, 1398782), (21, 999130), (22, 953715), (30, 699391), (31, 676830), (33, 635810), (35, 599478), (42, 499565), (55, 381486), (62, 338415), (66, 317905), (70, 299739), (77, 272490), (93, 225610), (105, 199826), (110, 190743), (154, 136245), (155, 135366), (165, 127162), (186, 112805), (210, 99913), (217, 96690), (231, 90830), (293, 71610), (310, 67683), (330, 63581), (341, 61530), (385, 54498), (434, 48345), (462, 45415), (465, 45122), (586, 35805), (651, 32230), (682, 30765), (770, 27249), (879, 23870), (930, 22561), (1023, 20510), (1085, 19338), (1155, 18166), (1302, 16115), (1465, 14322), (1705, 12306), (1758, 11935), (2046, 10255), (2051, 10230), (2170, 9669), (2310, 9083), (2387, 8790), (2930, 7161), (3223, 6510), (3255, 6446), (3410, 6153), (4102, 5115), (4395, 4774)]