21143210

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 44354304

約数和(自身を除く): 23211094

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 61, 110, 115, 122, 137, 230, 253, 274, 305, 506, 610, 671, 685, 1265, 1342, 1370, 1403, 1507, 2530, 2806, 3014, 3151, 3355, 6302, 6710, 7015, 7535, 8357, 14030, 15070, 15433, 15755, 16714, 30866, 31510, 34661, 41785, 69322, 77165, 83570, 91927, 154330, 173305, 183854, 192211, 346610, 384422, 459635, 919270, 961055, 1922110, 2114321, 4228642, 10571605, 21143210]

約数ペア:

[(1, 21143210), (2, 10571605), (5, 4228642), (10, 2114321), (11, 1922110), (22, 961055), (23, 919270), (46, 459635), (55, 384422), (61, 346610), (110, 192211), (115, 183854), (122, 173305), (137, 154330), (230, 91927), (253, 83570), (274, 77165), (305, 69322), (506, 41785), (610, 34661), (671, 31510), (685, 30866), (1265, 16714), (1342, 15755), (1370, 15433), (1403, 15070), (1507, 14030), (2530, 8357), (2806, 7535), (3014, 7015), (3151, 6710), (3355, 6302)]