21856554040

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{317}}^1\times {\mathrm{10979}}^1$

素因数の和:11464

約数の個数: 64

約数和(自身を含む): 49651120800

約数和(自身を除く): 27794566760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 317, 628, 634, 785, 1256, 1268, 1570, 1585, 2536, 3140, 3170, 6280, 6340, 10979, 12680, 21958, 43916, 49769, 54895, 87832, 99538, 109790, 199076, 219580, 248845, 398152, 439160, 497690, 995380, 1723703, 1990760, 3447406, 3480343, 6894812, 6960686, 8618515, 13789624, 13921372, 17237030, 17401715, 27842744, 34474060, 34803430, 68948120, 69606860, 139213720, 546413851, 1092827702, 2185655404, 2732069255, 4371310808, 5464138510, 10928277020, 21856554040]

約数ペア:

[(1, 21856554040), (2, 10928277020), (4, 5464138510), (5, 4371310808), (8, 2732069255), (10, 2185655404), (20, 1092827702), (40, 546413851), (157, 139213720), (314, 69606860), (317, 68948120), (628, 34803430), (634, 34474060), (785, 27842744), (1256, 17401715), (1268, 17237030), (1570, 13921372), (1585, 13789624), (2536, 8618515), (3140, 6960686), (3170, 6894812), (6280, 3480343), (6340, 3447406), (10979, 1990760), (12680, 1723703), (21958, 995380), (43916, 497690), (49769, 439160), (54895, 398152), (87832, 248845), (99538, 219580), (109790, 199076)]