640090136

素因数分解:

$2^3\times 7^3\times {\mathrm{89}}^1\times {\mathrm{2621}}^1$

素因数の和:2737

約数の個数: 64

約数和(自身を含む): 1415880000

約数和(自身を除く): 775789864

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 89, 98, 178, 196, 343, 356, 392, 623, 686, 712, 1246, 1372, 2492, 2621, 2744, 4361, 4984, 5242, 8722, 10484, 17444, 18347, 20968, 30527, 34888, 36694, 61054, 73388, 122108, 128429, 146776, 233269, 244216, 256858, 466538, 513716, 899003, 933076, 1027432, 1632883, 1798006, 1866152, 3265766, 3596012, 6531532, 7192024, 11430181, 13063064, 22860362, 45720724, 80011267, 91441448, 160022534, 320045068, 640090136]

約数ペア:

[(1, 640090136), (2, 320045068), (4, 160022534), (7, 91441448), (8, 80011267), (14, 45720724), (28, 22860362), (49, 13063064), (56, 11430181), (89, 7192024), (98, 6531532), (178, 3596012), (196, 3265766), (343, 1866152), (356, 1798006), (392, 1632883), (623, 1027432), (686, 933076), (712, 899003), (1246, 513716), (1372, 466538), (2492, 256858), (2621, 244216), (2744, 233269), (4361, 146776), (4984, 128429), (5242, 122108), (8722, 73388), (10484, 61054), (17444, 36694), (18347, 34888), (20968, 30527)]