261470120

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:259

約数の個数: 128

約数和(自身を含む): 643507200

約数和(自身を除く): 382037080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 37, 40, 41, 62, 74, 82, 124, 139, 148, 155, 164, 185, 205, 248, 278, 296, 310, 328, 370, 410, 556, 620, 695, 740, 820, 1112, 1147, 1240, 1271, 1390, 1480, 1517, 1640, 2294, 2542, 2780, 3034, 4309, 4588, 5084, 5143, 5560, 5699, 5735, 6068, 6355, 7585, 8618, 9176, 10168, 10286, 11398, 11470, 12136, 12710, 15170, 17236, 20572, 21545, 22796, 22940, 25420, 25715, 28495, 30340, 34472, 41144, 43090, 45592, 45880, 47027, 50840, 51430, 56990, 60680, 86180, 94054, 102860, 113980, 159433, 172360, 176669, 188108, 205720, 210863, 227960, 235135, 318866, 353338, 376216, 421726, 470270, 637732, 706676, 797165, 843452, 883345, 940540, 1054315, 1275464, 1413352, 1594330, 1686904, 1766690, 1881080, 2108630, 3188660, 3533380, 4217260, 6377320, 6536753, 7066760, 8434520, 13073506, 26147012, 32683765, 52294024, 65367530, 130735060, 261470120]

約数ペア:

[(1, 261470120), (2, 130735060), (4, 65367530), (5, 52294024), (8, 32683765), (10, 26147012), (20, 13073506), (31, 8434520), (37, 7066760), (40, 6536753), (41, 6377320), (62, 4217260), (74, 3533380), (82, 3188660), (124, 2108630), (139, 1881080), (148, 1766690), (155, 1686904), (164, 1594330), (185, 1413352), (205, 1275464), (248, 1054315), (278, 940540), (296, 883345), (310, 843452), (328, 797165), (370, 706676), (410, 637732), (556, 470270), (620, 421726), (695, 376216), (740, 353338), (820, 318866), (1112, 235135), (1147, 227960), (1240, 210863), (1271, 205720), (1390, 188108), (1480, 176669), (1517, 172360), (1640, 159433), (2294, 113980), (2542, 102860), (2780, 94054), (3034, 86180), (4309, 60680), (4588, 56990), (5084, 51430), (5143, 50840), (5560, 47027), (5699, 45880), (5735, 45592), (6068, 43090), (6355, 41144), (7585, 34472), (8618, 30340), (9176, 28495), (10168, 25715), (10286, 25420), (11398, 22940), (11470, 22796), (12136, 21545), (12710, 20572), (15170, 17236)]