21292040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{223}}^1$

素因数の和:283

約数の個数: 128

約数和(自身を含む): 61931520

約数和(自身を除く): 40639480

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 31, 35, 40, 44, 55, 56, 62, 70, 77, 88, 110, 124, 140, 154, 155, 217, 220, 223, 248, 280, 308, 310, 341, 385, 434, 440, 446, 616, 620, 682, 770, 868, 892, 1085, 1115, 1240, 1364, 1540, 1561, 1705, 1736, 1784, 2170, 2230, 2387, 2453, 2728, 3080, 3122, 3410, 4340, 4460, 4774, 4906, 6244, 6820, 6913, 7805, 8680, 8920, 9548, 9812, 11935, 12265, 12488, 13640, 13826, 15610, 17171, 19096, 19624, 23870, 24530, 27652, 31220, 34342, 34565, 47740, 48391, 49060, 55304, 62440, 68684, 69130, 76043, 85855, 95480, 96782, 98120, 137368, 138260, 152086, 171710, 193564, 241955, 276520, 304172, 343420, 380215, 387128, 483910, 532301, 608344, 686840, 760430, 967820, 1064602, 1520860, 1935640, 2129204, 2661505, 3041720, 4258408, 5323010, 10646020, 21292040]

約数ペア:

[(1, 21292040), (2, 10646020), (4, 5323010), (5, 4258408), (7, 3041720), (8, 2661505), (10, 2129204), (11, 1935640), (14, 1520860), (20, 1064602), (22, 967820), (28, 760430), (31, 686840), (35, 608344), (40, 532301), (44, 483910), (55, 387128), (56, 380215), (62, 343420), (70, 304172), (77, 276520), (88, 241955), (110, 193564), (124, 171710), (140, 152086), (154, 138260), (155, 137368), (217, 98120), (220, 96782), (223, 95480), (248, 85855), (280, 76043), (308, 69130), (310, 68684), (341, 62440), (385, 55304), (434, 49060), (440, 48391), (446, 47740), (616, 34565), (620, 34342), (682, 31220), (770, 27652), (868, 24530), (892, 23870), (1085, 19624), (1115, 19096), (1240, 17171), (1364, 15610), (1540, 13826), (1561, 13640), (1705, 12488), (1736, 12265), (1784, 11935), (2170, 9812), (2230, 9548), (2387, 8920), (2453, 8680), (2728, 7805), (3080, 6913), (3122, 6820), (3410, 6244), (4340, 4906), (4460, 4774)]