21181223680

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{533801}}^1$

素因数の和:533853

約数の個数: 72

約数和(自身を含む): 52372381824

約数和(自身を除く): 31191158144

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 19840, 39680, 533801, 1067602, 2135204, 2669005, 4270408, 5338010, 8540816, 10676020, 16547831, 17081632, 21352040, 33095662, 34163264, 42704080, 66191324, 68326528, 82739155, 85408160, 132382648, 136653056, 165478310, 170816320, 264765296, 330956620, 341632640, 529530592, 661913240, 683265280, 1059061184, 1323826480, 2118122368, 2647652960, 4236244736, 5295305920, 10590611840, 21181223680]

約数ペア:

[(1, 21181223680), (2, 10590611840), (4, 5295305920), (5, 4236244736), (8, 2647652960), (10, 2118122368), (16, 1323826480), (20, 1059061184), (31, 683265280), (32, 661913240), (40, 529530592), (62, 341632640), (64, 330956620), (80, 264765296), (124, 170816320), (128, 165478310), (155, 136653056), (160, 132382648), (248, 85408160), (256, 82739155), (310, 68326528), (320, 66191324), (496, 42704080), (620, 34163264), (640, 33095662), (992, 21352040), (1240, 17081632), (1280, 16547831), (1984, 10676020), (2480, 8540816), (3968, 5338010), (4960, 4270408), (7936, 2669005), (9920, 2135204), (19840, 1067602), (39680, 533801)]