21015648

素因数分解:

$2^5\times 3^2\times {\mathrm{43}}^1\times {\mathrm{1697}}^1$

素因数の和:1756

約数の個数: 72

約数和(自身を含む): 61189128

約数和(自身を除く): 40173480

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 43, 48, 72, 86, 96, 129, 144, 172, 258, 288, 344, 387, 516, 688, 774, 1032, 1376, 1548, 1697, 2064, 3096, 3394, 4128, 5091, 6192, 6788, 10182, 12384, 13576, 15273, 20364, 27152, 30546, 40728, 54304, 61092, 72971, 81456, 122184, 145942, 162912, 218913, 244368, 291884, 437826, 488736, 583768, 656739, 875652, 1167536, 1313478, 1751304, 2335072, 2626956, 3502608, 5253912, 7005216, 10507824, 21015648]

約数ペア:

[(1, 21015648), (2, 10507824), (3, 7005216), (4, 5253912), (6, 3502608), (8, 2626956), (9, 2335072), (12, 1751304), (16, 1313478), (18, 1167536), (24, 875652), (32, 656739), (36, 583768), (43, 488736), (48, 437826), (72, 291884), (86, 244368), (96, 218913), (129, 162912), (144, 145942), (172, 122184), (258, 81456), (288, 72971), (344, 61092), (387, 54304), (516, 40728), (688, 30546), (774, 27152), (1032, 20364), (1376, 15273), (1548, 13576), (1697, 12384), (2064, 10182), (3096, 6788), (3394, 6192), (4128, 5091)]