19953388

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1$

素因数の和:263

約数の個数: 72

約数和(自身を含む): 45045504

約数和(自身を除く): 25092116

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 41, 49, 52, 82, 91, 98, 164, 182, 191, 196, 287, 364, 382, 533, 574, 637, 764, 1066, 1148, 1274, 1337, 2009, 2132, 2483, 2548, 2674, 3731, 4018, 4966, 5348, 7462, 7831, 8036, 9359, 9932, 14924, 15662, 17381, 18718, 26117, 31324, 34762, 37436, 52234, 54817, 69524, 101803, 104468, 109634, 121667, 203606, 219268, 243334, 383719, 407212, 486668, 712621, 767438, 1425242, 1534876, 2850484, 4988347, 9976694, 19953388]

約数ペア:

[(1, 19953388), (2, 9976694), (4, 4988347), (7, 2850484), (13, 1534876), (14, 1425242), (26, 767438), (28, 712621), (41, 486668), (49, 407212), (52, 383719), (82, 243334), (91, 219268), (98, 203606), (164, 121667), (182, 109634), (191, 104468), (196, 101803), (287, 69524), (364, 54817), (382, 52234), (533, 37436), (574, 34762), (637, 31324), (764, 26117), (1066, 18718), (1148, 17381), (1274, 15662), (1337, 14924), (2009, 9932), (2132, 9359), (2483, 8036), (2548, 7831), (2674, 7462), (3731, 5348), (4018, 4966)]