21154280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:319

約数の個数: 96

約数和(自身を含む): 56881440

約数和(自身を除く): 35727160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 43, 49, 56, 70, 86, 98, 140, 172, 196, 215, 245, 251, 280, 301, 344, 392, 430, 490, 502, 602, 860, 980, 1004, 1204, 1255, 1505, 1720, 1757, 1960, 2008, 2107, 2408, 2510, 3010, 3514, 4214, 5020, 6020, 7028, 8428, 8785, 10040, 10535, 10793, 12040, 12299, 14056, 16856, 17570, 21070, 21586, 24598, 35140, 42140, 43172, 49196, 53965, 61495, 70280, 75551, 84280, 86344, 98392, 107930, 122990, 151102, 215860, 245980, 302204, 377755, 431720, 491960, 528857, 604408, 755510, 1057714, 1511020, 2115428, 2644285, 3022040, 4230856, 5288570, 10577140, 21154280]

約数ペア:

[(1, 21154280), (2, 10577140), (4, 5288570), (5, 4230856), (7, 3022040), (8, 2644285), (10, 2115428), (14, 1511020), (20, 1057714), (28, 755510), (35, 604408), (40, 528857), (43, 491960), (49, 431720), (56, 377755), (70, 302204), (86, 245980), (98, 215860), (140, 151102), (172, 122990), (196, 107930), (215, 98392), (245, 86344), (251, 84280), (280, 75551), (301, 70280), (344, 61495), (392, 53965), (430, 49196), (490, 43172), (502, 42140), (602, 35140), (860, 24598), (980, 21586), (1004, 21070), (1204, 17570), (1255, 16856), (1505, 14056), (1720, 12299), (1757, 12040), (1960, 10793), (2008, 10535), (2107, 10040), (2408, 8785), (2510, 8428), (3010, 7028), (3514, 6020), (4214, 5020)]