221405720

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:249

約数の個数: 128

約数和(自身を含む): 547430400

約数和(自身を除く): 326024680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 31, 40, 47, 58, 62, 94, 116, 124, 131, 145, 155, 188, 232, 235, 248, 262, 290, 310, 376, 470, 524, 580, 620, 655, 899, 940, 1048, 1160, 1240, 1310, 1363, 1457, 1798, 1880, 2620, 2726, 2914, 3596, 3799, 4061, 4495, 5240, 5452, 5828, 6157, 6815, 7192, 7285, 7598, 8122, 8990, 10904, 11656, 12314, 13630, 14570, 15196, 16244, 17980, 18995, 20305, 24628, 27260, 29140, 30392, 30785, 32488, 35960, 37990, 40610, 42253, 49256, 54520, 58280, 61570, 75980, 81220, 84506, 117769, 123140, 151960, 162440, 169012, 178553, 190867, 211265, 235538, 246280, 338024, 357106, 381734, 422530, 471076, 588845, 714212, 763468, 845060, 892765, 942152, 954335, 1177690, 1428424, 1526936, 1690120, 1785530, 1908670, 2355380, 3571060, 3817340, 4710760, 5535143, 7142120, 7634680, 11070286, 22140572, 27675715, 44281144, 55351430, 110702860, 221405720]

約数ペア:

[(1, 221405720), (2, 110702860), (4, 55351430), (5, 44281144), (8, 27675715), (10, 22140572), (20, 11070286), (29, 7634680), (31, 7142120), (40, 5535143), (47, 4710760), (58, 3817340), (62, 3571060), (94, 2355380), (116, 1908670), (124, 1785530), (131, 1690120), (145, 1526936), (155, 1428424), (188, 1177690), (232, 954335), (235, 942152), (248, 892765), (262, 845060), (290, 763468), (310, 714212), (376, 588845), (470, 471076), (524, 422530), (580, 381734), (620, 357106), (655, 338024), (899, 246280), (940, 235538), (1048, 211265), (1160, 190867), (1240, 178553), (1310, 169012), (1363, 162440), (1457, 151960), (1798, 123140), (1880, 117769), (2620, 84506), (2726, 81220), (2914, 75980), (3596, 61570), (3799, 58280), (4061, 54520), (4495, 49256), (5240, 42253), (5452, 40610), (5828, 37990), (6157, 35960), (6815, 32488), (7192, 30785), (7285, 30392), (7598, 29140), (8122, 27260), (8990, 24628), (10904, 20305), (11656, 18995), (12314, 17980), (13630, 16244), (14570, 15196)]