21386340

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{241}}^1$

素因数の和:302

約数の個数: 144

約数和(自身を含む): 71351280

約数和(自身を除く): 49964940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 29, 30, 34, 36, 45, 51, 58, 60, 68, 85, 87, 90, 102, 116, 145, 153, 170, 174, 180, 204, 241, 255, 261, 290, 306, 340, 348, 435, 482, 493, 510, 522, 580, 612, 723, 765, 870, 964, 986, 1020, 1044, 1205, 1305, 1446, 1479, 1530, 1740, 1972, 2169, 2410, 2465, 2610, 2892, 2958, 3060, 3615, 4097, 4338, 4437, 4820, 4930, 5220, 5916, 6989, 7230, 7395, 8194, 8676, 8874, 9860, 10845, 12291, 13978, 14460, 14790, 16388, 17748, 20485, 20967, 21690, 22185, 24582, 27956, 29580, 34945, 36873, 40970, 41934, 43380, 44370, 49164, 61455, 62901, 69890, 73746, 81940, 83868, 88740, 104835, 118813, 122910, 125802, 139780, 147492, 184365, 209670, 237626, 245820, 251604, 314505, 356439, 368730, 419340, 475252, 594065, 629010, 712878, 737460, 1069317, 1188130, 1258020, 1425756, 1782195, 2138634, 2376260, 3564390, 4277268, 5346585, 7128780, 10693170, 21386340]

約数ペア:

[(1, 21386340), (2, 10693170), (3, 7128780), (4, 5346585), (5, 4277268), (6, 3564390), (9, 2376260), (10, 2138634), (12, 1782195), (15, 1425756), (17, 1258020), (18, 1188130), (20, 1069317), (29, 737460), (30, 712878), (34, 629010), (36, 594065), (45, 475252), (51, 419340), (58, 368730), (60, 356439), (68, 314505), (85, 251604), (87, 245820), (90, 237626), (102, 209670), (116, 184365), (145, 147492), (153, 139780), (170, 125802), (174, 122910), (180, 118813), (204, 104835), (241, 88740), (255, 83868), (261, 81940), (290, 73746), (306, 69890), (340, 62901), (348, 61455), (435, 49164), (482, 44370), (493, 43380), (510, 41934), (522, 40970), (580, 36873), (612, 34945), (723, 29580), (765, 27956), (870, 24582), (964, 22185), (986, 21690), (1020, 20967), (1044, 20485), (1205, 17748), (1305, 16388), (1446, 14790), (1479, 14460), (1530, 13978), (1740, 12291), (1972, 10845), (2169, 9860), (2410, 8874), (2465, 8676), (2610, 8194), (2892, 7395), (2958, 7230), (3060, 6989), (3615, 5916), (4097, 5220), (4338, 4930), (4437, 4820)]