18910970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:279

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 21005830

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 43, 65, 85, 86, 130, 170, 199, 215, 221, 398, 430, 442, 559, 731, 995, 1105, 1118, 1462, 1990, 2210, 2587, 2795, 3383, 3655, 5174, 5590, 6766, 7310, 8557, 9503, 12935, 16915, 17114, 19006, 25870, 33830, 42785, 43979, 47515, 85570, 87958, 95030, 111241, 145469, 219895, 222482, 290938, 439790, 556205, 727345, 1112410, 1454690, 1891097, 3782194, 9455485, 18910970]

約数ペア:

[(1, 18910970), (2, 9455485), (5, 3782194), (10, 1891097), (13, 1454690), (17, 1112410), (26, 727345), (34, 556205), (43, 439790), (65, 290938), (85, 222482), (86, 219895), (130, 145469), (170, 111241), (199, 95030), (215, 87958), (221, 85570), (398, 47515), (430, 43979), (442, 42785), (559, 33830), (731, 25870), (995, 19006), (1105, 17114), (1118, 16915), (1462, 12935), (1990, 9503), (2210, 8557), (2587, 7310), (2795, 6766), (3383, 5590), (3655, 5174)]