81404740

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:229

約数の個数: 96

約数和(自身を含む): 190512000

約数和(自身を除く): 109107260

約数列:

[1, 2, 4, 5, 10, 19, 20, 29, 38, 58, 76, 83, 89, 95, 116, 145, 166, 178, 190, 290, 332, 356, 380, 415, 445, 551, 580, 830, 890, 1102, 1577, 1660, 1691, 1780, 2204, 2407, 2581, 2755, 3154, 3382, 4814, 5162, 5510, 6308, 6764, 7387, 7885, 8455, 9628, 10324, 11020, 12035, 12905, 14774, 15770, 16910, 24070, 25810, 29548, 31540, 33820, 36935, 45733, 48140, 49039, 51620, 73870, 91466, 98078, 140353, 147740, 182932, 196156, 214223, 228665, 245195, 280706, 428446, 457330, 490390, 561412, 701765, 856892, 914660, 980780, 1071115, 1403530, 2142230, 2807060, 4070237, 4284460, 8140474, 16280948, 20351185, 40702370, 81404740]

約数ペア:

[(1, 81404740), (2, 40702370), (4, 20351185), (5, 16280948), (10, 8140474), (19, 4284460), (20, 4070237), (29, 2807060), (38, 2142230), (58, 1403530), (76, 1071115), (83, 980780), (89, 914660), (95, 856892), (116, 701765), (145, 561412), (166, 490390), (178, 457330), (190, 428446), (290, 280706), (332, 245195), (356, 228665), (380, 214223), (415, 196156), (445, 182932), (551, 147740), (580, 140353), (830, 98078), (890, 91466), (1102, 73870), (1577, 51620), (1660, 49039), (1691, 48140), (1780, 45733), (2204, 36935), (2407, 33820), (2581, 31540), (2755, 29548), (3154, 25810), (3382, 24070), (4814, 16910), (5162, 15770), (5510, 14774), (6308, 12905), (6764, 12035), (7387, 11020), (7885, 10324), (8455, 9628)]