21000939970

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{138337}}^1$

素因数の和:138427

約数の個数: 64

約数和(自身を含む): 43028651520

約数和(自身を除く): 22027711550

約数列:

[1, 2, 5, 10, 17, 19, 34, 38, 47, 85, 94, 95, 170, 190, 235, 323, 470, 646, 799, 893, 1598, 1615, 1786, 3230, 3995, 4465, 7990, 8930, 15181, 30362, 75905, 138337, 151810, 276674, 691685, 1383370, 2351729, 2628403, 4703458, 5256806, 6501839, 11758645, 13003678, 13142015, 23517290, 26284030, 32509195, 44682851, 65018390, 89365702, 110531263, 123534941, 221062526, 223414255, 247069882, 446828510, 552656315, 617674705, 1105312630, 1235349410, 2100093997, 4200187994, 10500469985, 21000939970]

約数ペア:

[(1, 21000939970), (2, 10500469985), (5, 4200187994), (10, 2100093997), (17, 1235349410), (19, 1105312630), (34, 617674705), (38, 552656315), (47, 446828510), (85, 247069882), (94, 223414255), (95, 221062526), (170, 123534941), (190, 110531263), (235, 89365702), (323, 65018390), (470, 44682851), (646, 32509195), (799, 26284030), (893, 23517290), (1598, 13142015), (1615, 13003678), (1786, 11758645), (3230, 6501839), (3995, 5256806), (4465, 4703458), (7990, 2628403), (8930, 2351729), (15181, 1383370), (30362, 691685), (75905, 276674), (138337, 151810)]