1279890920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{21871}}^1$

素因数の和:21919

約数の個数: 128

約数和(自身を含む): 3779481600

約数和(自身を除く): 2499590680

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 19, 20, 22, 28, 35, 38, 40, 44, 55, 56, 70, 76, 77, 88, 95, 110, 133, 140, 152, 154, 190, 209, 220, 266, 280, 308, 380, 385, 418, 440, 532, 616, 665, 760, 770, 836, 1045, 1064, 1330, 1463, 1540, 1672, 2090, 2660, 2926, 3080, 4180, 5320, 5852, 7315, 8360, 11704, 14630, 21871, 29260, 43742, 58520, 87484, 109355, 153097, 174968, 218710, 240581, 306194, 415549, 437420, 481162, 612388, 765485, 831098, 874840, 962324, 1202905, 1224776, 1530970, 1662196, 1684067, 1924648, 2077745, 2405810, 2908843, 3061940, 3324392, 3368134, 4155490, 4571039, 4811620, 5817686, 6123880, 6736268, 8310980, 8420335, 9142078, 9623240, 11635372, 13472536, 14544215, 16621960, 16840670, 18284156, 22855195, 23270744, 29088430, 31997273, 33681340, 36568312, 45710390, 58176860, 63994546, 67362680, 91420780, 116353720, 127989092, 159986365, 182841560, 255978184, 319972730, 639945460, 1279890920]

約数ペア:

[(1, 1279890920), (2, 639945460), (4, 319972730), (5, 255978184), (7, 182841560), (8, 159986365), (10, 127989092), (11, 116353720), (14, 91420780), (19, 67362680), (20, 63994546), (22, 58176860), (28, 45710390), (35, 36568312), (38, 33681340), (40, 31997273), (44, 29088430), (55, 23270744), (56, 22855195), (70, 18284156), (76, 16840670), (77, 16621960), (88, 14544215), (95, 13472536), (110, 11635372), (133, 9623240), (140, 9142078), (152, 8420335), (154, 8310980), (190, 6736268), (209, 6123880), (220, 5817686), (266, 4811620), (280, 4571039), (308, 4155490), (380, 3368134), (385, 3324392), (418, 3061940), (440, 2908843), (532, 2405810), (616, 2077745), (665, 1924648), (760, 1684067), (770, 1662196), (836, 1530970), (1045, 1224776), (1064, 1202905), (1330, 962324), (1463, 874840), (1540, 831098), (1672, 765485), (2090, 612388), (2660, 481162), (2926, 437420), (3080, 415549), (4180, 306194), (5320, 240581), (5852, 218710), (7315, 174968), (8360, 153097), (11704, 109355), (14630, 87484), (21871, 58520), (29260, 43742)]