256958940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1231}}^1$

素因数の和:1328

約数の個数: 144

約数和(自身を含む): 849429504

約数和(自身を除く): 592470564

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 71, 84, 98, 105, 140, 142, 147, 196, 210, 213, 245, 284, 294, 355, 420, 426, 490, 497, 588, 710, 735, 852, 980, 994, 1065, 1231, 1420, 1470, 1491, 1988, 2130, 2462, 2485, 2940, 2982, 3479, 3693, 4260, 4924, 4970, 5964, 6155, 6958, 7386, 7455, 8617, 9940, 10437, 12310, 13916, 14772, 14910, 17234, 17395, 18465, 20874, 24620, 25851, 29820, 34468, 34790, 36930, 41748, 43085, 51702, 52185, 60319, 69580, 73860, 86170, 87401, 103404, 104370, 120638, 129255, 172340, 174802, 180957, 208740, 241276, 258510, 262203, 301595, 349604, 361914, 437005, 517020, 524406, 603190, 611807, 723828, 874010, 904785, 1048812, 1206380, 1223614, 1311015, 1748020, 1809570, 1835421, 2447228, 2622030, 3059035, 3619140, 3670842, 4282649, 5244060, 6118070, 7341684, 8565298, 9177105, 12236140, 12847947, 17130596, 18354210, 21413245, 25695894, 36708420, 42826490, 51391788, 64239735, 85652980, 128479470, 256958940]

約数ペア:

[(1, 256958940), (2, 128479470), (3, 85652980), (4, 64239735), (5, 51391788), (6, 42826490), (7, 36708420), (10, 25695894), (12, 21413245), (14, 18354210), (15, 17130596), (20, 12847947), (21, 12236140), (28, 9177105), (30, 8565298), (35, 7341684), (42, 6118070), (49, 5244060), (60, 4282649), (70, 3670842), (71, 3619140), (84, 3059035), (98, 2622030), (105, 2447228), (140, 1835421), (142, 1809570), (147, 1748020), (196, 1311015), (210, 1223614), (213, 1206380), (245, 1048812), (284, 904785), (294, 874010), (355, 723828), (420, 611807), (426, 603190), (490, 524406), (497, 517020), (588, 437005), (710, 361914), (735, 349604), (852, 301595), (980, 262203), (994, 258510), (1065, 241276), (1231, 208740), (1420, 180957), (1470, 174802), (1491, 172340), (1988, 129255), (2130, 120638), (2462, 104370), (2485, 103404), (2940, 87401), (2982, 86170), (3479, 73860), (3693, 69580), (4260, 60319), (4924, 52185), (4970, 51702), (5964, 43085), (6155, 41748), (6958, 36930), (7386, 34790), (7455, 34468), (8617, 29820), (9940, 25851), (10437, 24620), (12310, 20874), (13916, 18465), (14772, 17395), (14910, 17234)]