21112920

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{173}}^1$

素因数の和:306

約数の個数: 128

約数和(自身を含む): 71409600

約数和(自身を除く): 50296680

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 90, 108, 113, 120, 135, 173, 180, 216, 226, 270, 339, 346, 360, 452, 519, 540, 565, 678, 692, 865, 904, 1017, 1038, 1080, 1130, 1356, 1384, 1557, 1695, 1730, 2034, 2076, 2260, 2595, 2712, 3051, 3114, 3390, 3460, 4068, 4152, 4520, 4671, 5085, 5190, 6102, 6228, 6780, 6920, 7785, 8136, 9342, 10170, 10380, 12204, 12456, 13560, 15255, 15570, 18684, 19549, 20340, 20760, 23355, 24408, 30510, 31140, 37368, 39098, 40680, 46710, 58647, 61020, 62280, 78196, 93420, 97745, 117294, 122040, 156392, 175941, 186840, 195490, 234588, 293235, 351882, 390980, 469176, 527823, 586470, 703764, 781960, 879705, 1055646, 1172940, 1407528, 1759410, 2111292, 2345880, 2639115, 3518820, 4222584, 5278230, 7037640, 10556460, 21112920]

約数ペア:

[(1, 21112920), (2, 10556460), (3, 7037640), (4, 5278230), (5, 4222584), (6, 3518820), (8, 2639115), (9, 2345880), (10, 2111292), (12, 1759410), (15, 1407528), (18, 1172940), (20, 1055646), (24, 879705), (27, 781960), (30, 703764), (36, 586470), (40, 527823), (45, 469176), (54, 390980), (60, 351882), (72, 293235), (90, 234588), (108, 195490), (113, 186840), (120, 175941), (135, 156392), (173, 122040), (180, 117294), (216, 97745), (226, 93420), (270, 78196), (339, 62280), (346, 61020), (360, 58647), (452, 46710), (519, 40680), (540, 39098), (565, 37368), (678, 31140), (692, 30510), (865, 24408), (904, 23355), (1017, 20760), (1038, 20340), (1080, 19549), (1130, 18684), (1356, 15570), (1384, 15255), (1557, 13560), (1695, 12456), (1730, 12204), (2034, 10380), (2076, 10170), (2260, 9342), (2595, 8136), (2712, 7785), (3051, 6920), (3114, 6780), (3390, 6228), (3460, 6102), (4068, 5190), (4152, 5085), (4520, 4671)]