20798820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{971}}^1$

素因数の和:1010

約数の個数: 144

約数和(自身を含む): 76422528

約数和(自身を除く): 55623708

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 17, 18, 20, 21, 28, 30, 34, 35, 36, 42, 45, 51, 60, 63, 68, 70, 84, 85, 90, 102, 105, 119, 126, 140, 153, 170, 180, 204, 210, 238, 252, 255, 306, 315, 340, 357, 420, 476, 510, 595, 612, 630, 714, 765, 971, 1020, 1071, 1190, 1260, 1428, 1530, 1785, 1942, 2142, 2380, 2913, 3060, 3570, 3884, 4284, 4855, 5355, 5826, 6797, 7140, 8739, 9710, 10710, 11652, 13594, 14565, 16507, 17478, 19420, 20391, 21420, 27188, 29130, 33014, 33985, 34956, 40782, 43695, 49521, 58260, 61173, 66028, 67970, 81564, 82535, 87390, 99042, 101955, 115549, 122346, 135940, 148563, 165070, 174780, 198084, 203910, 231098, 244692, 247605, 297126, 305865, 330140, 346647, 407820, 462196, 495210, 577745, 594252, 611730, 693294, 742815, 990420, 1039941, 1155490, 1223460, 1386588, 1485630, 1733235, 2079882, 2310980, 2971260, 3466470, 4159764, 5199705, 6932940, 10399410, 20798820]

約数ペア:

[(1, 20798820), (2, 10399410), (3, 6932940), (4, 5199705), (5, 4159764), (6, 3466470), (7, 2971260), (9, 2310980), (10, 2079882), (12, 1733235), (14, 1485630), (15, 1386588), (17, 1223460), (18, 1155490), (20, 1039941), (21, 990420), (28, 742815), (30, 693294), (34, 611730), (35, 594252), (36, 577745), (42, 495210), (45, 462196), (51, 407820), (60, 346647), (63, 330140), (68, 305865), (70, 297126), (84, 247605), (85, 244692), (90, 231098), (102, 203910), (105, 198084), (119, 174780), (126, 165070), (140, 148563), (153, 135940), (170, 122346), (180, 115549), (204, 101955), (210, 99042), (238, 87390), (252, 82535), (255, 81564), (306, 67970), (315, 66028), (340, 61173), (357, 58260), (420, 49521), (476, 43695), (510, 40782), (595, 34956), (612, 33985), (630, 33014), (714, 29130), (765, 27188), (971, 21420), (1020, 20391), (1071, 19420), (1190, 17478), (1260, 16507), (1428, 14565), (1530, 13594), (1785, 11652), (1942, 10710), (2142, 9710), (2380, 8739), (2913, 7140), (3060, 6797), (3570, 5826), (3884, 5355), (4284, 4855)]