21780840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{233}}^1$

素因数の和:307

約数の個数: 128

約数和(自身を含む): 70761600

約数和(自身を除く): 48980760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 20, 24, 30, 38, 40, 41, 57, 60, 76, 82, 95, 114, 120, 123, 152, 164, 190, 205, 228, 233, 246, 285, 328, 380, 410, 456, 466, 492, 570, 615, 699, 760, 779, 820, 932, 984, 1140, 1165, 1230, 1398, 1558, 1640, 1864, 2280, 2330, 2337, 2460, 2796, 3116, 3495, 3895, 4427, 4660, 4674, 4920, 5592, 6232, 6990, 7790, 8854, 9320, 9348, 9553, 11685, 13281, 13980, 15580, 17708, 18696, 19106, 22135, 23370, 26562, 27960, 28659, 31160, 35416, 38212, 44270, 46740, 47765, 53124, 57318, 66405, 76424, 88540, 93480, 95530, 106248, 114636, 132810, 143295, 177080, 181507, 191060, 229272, 265620, 286590, 363014, 382120, 531240, 544521, 573180, 726028, 907535, 1089042, 1146360, 1452056, 1815070, 2178084, 2722605, 3630140, 4356168, 5445210, 7260280, 10890420, 21780840]

約数ペア:

[(1, 21780840), (2, 10890420), (3, 7260280), (4, 5445210), (5, 4356168), (6, 3630140), (8, 2722605), (10, 2178084), (12, 1815070), (15, 1452056), (19, 1146360), (20, 1089042), (24, 907535), (30, 726028), (38, 573180), (40, 544521), (41, 531240), (57, 382120), (60, 363014), (76, 286590), (82, 265620), (95, 229272), (114, 191060), (120, 181507), (123, 177080), (152, 143295), (164, 132810), (190, 114636), (205, 106248), (228, 95530), (233, 93480), (246, 88540), (285, 76424), (328, 66405), (380, 57318), (410, 53124), (456, 47765), (466, 46740), (492, 44270), (570, 38212), (615, 35416), (699, 31160), (760, 28659), (779, 27960), (820, 26562), (932, 23370), (984, 22135), (1140, 19106), (1165, 18696), (1230, 17708), (1398, 15580), (1558, 13980), (1640, 13281), (1864, 11685), (2280, 9553), (2330, 9348), (2337, 9320), (2460, 8854), (2796, 7790), (3116, 6990), (3495, 6232), (3895, 5592), (4427, 4920), (4660, 4674)]