256388280

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{809}}^1$

素因数の和:981

約数の個数: 128

約数和(自身を含む): 816480000

約数和(自身を除く): 560091720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 57, 60, 76, 95, 114, 120, 139, 152, 190, 228, 278, 285, 380, 417, 456, 556, 570, 695, 760, 809, 834, 1112, 1140, 1390, 1618, 1668, 2085, 2280, 2427, 2641, 2780, 3236, 3336, 4045, 4170, 4854, 5282, 5560, 6472, 7923, 8090, 8340, 9708, 10564, 12135, 13205, 15371, 15846, 16180, 16680, 19416, 21128, 24270, 26410, 30742, 31692, 32360, 39615, 46113, 48540, 52820, 61484, 63384, 76855, 79230, 92226, 97080, 105640, 112451, 122968, 153710, 158460, 184452, 224902, 230565, 307420, 316920, 337353, 368904, 449804, 461130, 562255, 614840, 674706, 899608, 922260, 1124510, 1349412, 1686765, 1844520, 2136569, 2249020, 2698824, 3373530, 4273138, 4498040, 6409707, 6747060, 8546276, 10682845, 12819414, 13494120, 17092552, 21365690, 25638828, 32048535, 42731380, 51277656, 64097070, 85462760, 128194140, 256388280]

約数ペア:

[(1, 256388280), (2, 128194140), (3, 85462760), (4, 64097070), (5, 51277656), (6, 42731380), (8, 32048535), (10, 25638828), (12, 21365690), (15, 17092552), (19, 13494120), (20, 12819414), (24, 10682845), (30, 8546276), (38, 6747060), (40, 6409707), (57, 4498040), (60, 4273138), (76, 3373530), (95, 2698824), (114, 2249020), (120, 2136569), (139, 1844520), (152, 1686765), (190, 1349412), (228, 1124510), (278, 922260), (285, 899608), (380, 674706), (417, 614840), (456, 562255), (556, 461130), (570, 449804), (695, 368904), (760, 337353), (809, 316920), (834, 307420), (1112, 230565), (1140, 224902), (1390, 184452), (1618, 158460), (1668, 153710), (2085, 122968), (2280, 112451), (2427, 105640), (2641, 97080), (2780, 92226), (3236, 79230), (3336, 76855), (4045, 63384), (4170, 61484), (4854, 52820), (5282, 48540), (5560, 46113), (6472, 39615), (7923, 32360), (8090, 31692), (8340, 30742), (9708, 26410), (10564, 24270), (12135, 21128), (13205, 19416), (15371, 16680), (15846, 16180)]