21789240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{971}}^1$

素因数の和:1013

約数の個数: 128

約数和(自身を含む): 75582720

約数和(自身を除く): 53793480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 17, 20, 22, 24, 30, 33, 34, 40, 44, 51, 55, 60, 66, 68, 85, 88, 102, 110, 120, 132, 136, 165, 170, 187, 204, 220, 255, 264, 330, 340, 374, 408, 440, 510, 561, 660, 680, 748, 935, 971, 1020, 1122, 1320, 1496, 1870, 1942, 2040, 2244, 2805, 2913, 3740, 3884, 4488, 4855, 5610, 5826, 7480, 7768, 9710, 10681, 11220, 11652, 14565, 16507, 19420, 21362, 22440, 23304, 29130, 32043, 33014, 38840, 42724, 49521, 53405, 58260, 64086, 66028, 82535, 85448, 99042, 106810, 116520, 128172, 132056, 160215, 165070, 181577, 198084, 213620, 247605, 256344, 320430, 330140, 363154, 396168, 427240, 495210, 544731, 640860, 660280, 726308, 907885, 990420, 1089462, 1281720, 1452616, 1815770, 1980840, 2178924, 2723655, 3631540, 4357848, 5447310, 7263080, 10894620, 21789240]

約数ペア:

[(1, 21789240), (2, 10894620), (3, 7263080), (4, 5447310), (5, 4357848), (6, 3631540), (8, 2723655), (10, 2178924), (11, 1980840), (12, 1815770), (15, 1452616), (17, 1281720), (20, 1089462), (22, 990420), (24, 907885), (30, 726308), (33, 660280), (34, 640860), (40, 544731), (44, 495210), (51, 427240), (55, 396168), (60, 363154), (66, 330140), (68, 320430), (85, 256344), (88, 247605), (102, 213620), (110, 198084), (120, 181577), (132, 165070), (136, 160215), (165, 132056), (170, 128172), (187, 116520), (204, 106810), (220, 99042), (255, 85448), (264, 82535), (330, 66028), (340, 64086), (374, 58260), (408, 53405), (440, 49521), (510, 42724), (561, 38840), (660, 33014), (680, 32043), (748, 29130), (935, 23304), (971, 22440), (1020, 21362), (1122, 19420), (1320, 16507), (1496, 14565), (1870, 11652), (1942, 11220), (2040, 10681), (2244, 9710), (2805, 7768), (2913, 7480), (3740, 5826), (3884, 5610), (4488, 4855)]