644070640

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{179}}^1\times {\mathrm{1097}}^1$

素因数の和:1330

約数の個数: 80

約数和(自身を含む): 1543963680

約数和(自身を除く): 899893040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 179, 205, 328, 358, 410, 656, 716, 820, 895, 1097, 1432, 1640, 1790, 2194, 2864, 3280, 3580, 4388, 5485, 7160, 7339, 8776, 10970, 14320, 14678, 17552, 21940, 29356, 36695, 43880, 44977, 58712, 73390, 87760, 89954, 117424, 146780, 179908, 196363, 224885, 293560, 359816, 392726, 449770, 587120, 719632, 785452, 899540, 981815, 1570904, 1799080, 1963630, 3141808, 3598160, 3927260, 7854520, 8050883, 15709040, 16101766, 32203532, 40254415, 64407064, 80508830, 128814128, 161017660, 322035320, 644070640]

約数ペア:

[(1, 644070640), (2, 322035320), (4, 161017660), (5, 128814128), (8, 80508830), (10, 64407064), (16, 40254415), (20, 32203532), (40, 16101766), (41, 15709040), (80, 8050883), (82, 7854520), (164, 3927260), (179, 3598160), (205, 3141808), (328, 1963630), (358, 1799080), (410, 1570904), (656, 981815), (716, 899540), (820, 785452), (895, 719632), (1097, 587120), (1432, 449770), (1640, 392726), (1790, 359816), (2194, 293560), (2864, 224885), (3280, 196363), (3580, 179908), (4388, 146780), (5485, 117424), (7160, 89954), (7339, 87760), (8776, 73390), (10970, 58712), (14320, 44977), (14678, 43880), (17552, 36695), (21940, 29356)]