21657660

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1249}}^1$

素因数の和:1295

約数の個数: 72

約数和(自身を含む): 64470000

約数和(自身を除く): 42812340

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 289, 340, 510, 578, 867, 1020, 1156, 1249, 1445, 1734, 2498, 2890, 3468, 3747, 4335, 4996, 5780, 6245, 7494, 8670, 12490, 14988, 17340, 18735, 21233, 24980, 37470, 42466, 63699, 74940, 84932, 106165, 127398, 212330, 254796, 318495, 360961, 424660, 636990, 721922, 1082883, 1273980, 1443844, 1804805, 2165766, 3609610, 4331532, 5414415, 7219220, 10828830, 21657660]

約数ペア:

[(1, 21657660), (2, 10828830), (3, 7219220), (4, 5414415), (5, 4331532), (6, 3609610), (10, 2165766), (12, 1804805), (15, 1443844), (17, 1273980), (20, 1082883), (30, 721922), (34, 636990), (51, 424660), (60, 360961), (68, 318495), (85, 254796), (102, 212330), (170, 127398), (204, 106165), (255, 84932), (289, 74940), (340, 63699), (510, 42466), (578, 37470), (867, 24980), (1020, 21233), (1156, 18735), (1249, 17340), (1445, 14988), (1734, 12490), (2498, 8670), (2890, 7494), (3468, 6245), (3747, 5780), (4335, 4996)]