661187840

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{877}}^1$

素因数の和:948

約数の個数: 144

約数和(自身を含む): 1722846720

約数和(自身を除く): 1061658880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 31, 32, 38, 40, 62, 64, 76, 80, 95, 124, 128, 152, 155, 160, 190, 248, 256, 304, 310, 320, 380, 496, 589, 608, 620, 640, 760, 877, 992, 1178, 1216, 1240, 1280, 1520, 1754, 1984, 2356, 2432, 2480, 2945, 3040, 3508, 3968, 4385, 4712, 4864, 4960, 5890, 6080, 7016, 7936, 8770, 9424, 9920, 11780, 12160, 14032, 16663, 17540, 18848, 19840, 23560, 24320, 27187, 28064, 33326, 35080, 37696, 39680, 47120, 54374, 56128, 66652, 70160, 75392, 83315, 94240, 108748, 112256, 133304, 135935, 140320, 150784, 166630, 188480, 217496, 224512, 266608, 271870, 280640, 333260, 376960, 434992, 516553, 533216, 543740, 561280, 666520, 753920, 869984, 1033106, 1066432, 1087480, 1122560, 1333040, 1739968, 2066212, 2132864, 2174960, 2582765, 2666080, 3479936, 4132424, 4265728, 4349920, 5165530, 5332160, 6959872, 8264848, 8699840, 10331060, 10664320, 16529696, 17399680, 20662120, 21328640, 33059392, 34799360, 41324240, 66118784, 82648480, 132237568, 165296960, 330593920, 661187840]

約数ペア:

[(1, 661187840), (2, 330593920), (4, 165296960), (5, 132237568), (8, 82648480), (10, 66118784), (16, 41324240), (19, 34799360), (20, 33059392), (31, 21328640), (32, 20662120), (38, 17399680), (40, 16529696), (62, 10664320), (64, 10331060), (76, 8699840), (80, 8264848), (95, 6959872), (124, 5332160), (128, 5165530), (152, 4349920), (155, 4265728), (160, 4132424), (190, 3479936), (248, 2666080), (256, 2582765), (304, 2174960), (310, 2132864), (320, 2066212), (380, 1739968), (496, 1333040), (589, 1122560), (608, 1087480), (620, 1066432), (640, 1033106), (760, 869984), (877, 753920), (992, 666520), (1178, 561280), (1216, 543740), (1240, 533216), (1280, 516553), (1520, 434992), (1754, 376960), (1984, 333260), (2356, 280640), (2432, 271870), (2480, 266608), (2945, 224512), (3040, 217496), (3508, 188480), (3968, 166630), (4385, 150784), (4712, 140320), (4864, 135935), (4960, 133304), (5890, 112256), (6080, 108748), (7016, 94240), (7936, 83315), (8770, 75392), (9424, 70160), (9920, 66652), (11780, 56128), (12160, 54374), (14032, 47120), (16663, 39680), (17540, 37696), (18848, 35080), (19840, 33326), (23560, 28064), (24320, 27187)]