263947640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{523}}^1$

素因数の和:613

約数の個数: 128

約数和(自身を含む): 688158720

約数和(自身を除く): 424211080

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 37, 40, 44, 55, 62, 74, 88, 110, 124, 148, 155, 185, 220, 248, 296, 310, 341, 370, 407, 440, 523, 620, 682, 740, 814, 1046, 1147, 1240, 1364, 1480, 1628, 1705, 2035, 2092, 2294, 2615, 2728, 3256, 3410, 4070, 4184, 4588, 5230, 5735, 5753, 6820, 8140, 9176, 10460, 11470, 11506, 12617, 13640, 16213, 16280, 19351, 20920, 22940, 23012, 25234, 28765, 32426, 38702, 45880, 46024, 50468, 57530, 63085, 64852, 77404, 81065, 96755, 100936, 115060, 126170, 129704, 154808, 162130, 178343, 193510, 212861, 230120, 252340, 324260, 356686, 387020, 425722, 504680, 599881, 648520, 713372, 774040, 851444, 891715, 1064305, 1199762, 1426744, 1702888, 1783430, 2128610, 2399524, 2999405, 3566860, 4257220, 4799048, 5998810, 6598691, 7133720, 8514440, 11997620, 13197382, 23995240, 26394764, 32993455, 52789528, 65986910, 131973820, 263947640]

約数ペア:

[(1, 263947640), (2, 131973820), (4, 65986910), (5, 52789528), (8, 32993455), (10, 26394764), (11, 23995240), (20, 13197382), (22, 11997620), (31, 8514440), (37, 7133720), (40, 6598691), (44, 5998810), (55, 4799048), (62, 4257220), (74, 3566860), (88, 2999405), (110, 2399524), (124, 2128610), (148, 1783430), (155, 1702888), (185, 1426744), (220, 1199762), (248, 1064305), (296, 891715), (310, 851444), (341, 774040), (370, 713372), (407, 648520), (440, 599881), (523, 504680), (620, 425722), (682, 387020), (740, 356686), (814, 324260), (1046, 252340), (1147, 230120), (1240, 212861), (1364, 193510), (1480, 178343), (1628, 162130), (1705, 154808), (2035, 129704), (2092, 126170), (2294, 115060), (2615, 100936), (2728, 96755), (3256, 81065), (3410, 77404), (4070, 64852), (4184, 63085), (4588, 57530), (5230, 50468), (5735, 46024), (5753, 45880), (6820, 38702), (8140, 32426), (9176, 28765), (10460, 25234), (11470, 23012), (11506, 22940), (12617, 20920), (13640, 19351), (16213, 16280)]