19781892

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{983}}^1$

素因数の和:1049

約数の個数: 72

約数和(自身を含む): 55159104

約数和(自身を除く): 35377212

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 43, 52, 78, 86, 117, 129, 156, 172, 234, 258, 387, 468, 516, 559, 774, 983, 1118, 1548, 1677, 1966, 2236, 2949, 3354, 3932, 5031, 5898, 6708, 8847, 10062, 11796, 12779, 17694, 20124, 25558, 35388, 38337, 42269, 51116, 76674, 84538, 115011, 126807, 153348, 169076, 230022, 253614, 380421, 460044, 507228, 549497, 760842, 1098994, 1521684, 1648491, 2197988, 3296982, 4945473, 6593964, 9890946, 19781892]

約数ペア:

[(1, 19781892), (2, 9890946), (3, 6593964), (4, 4945473), (6, 3296982), (9, 2197988), (12, 1648491), (13, 1521684), (18, 1098994), (26, 760842), (36, 549497), (39, 507228), (43, 460044), (52, 380421), (78, 253614), (86, 230022), (117, 169076), (129, 153348), (156, 126807), (172, 115011), (234, 84538), (258, 76674), (387, 51116), (468, 42269), (516, 38337), (559, 35388), (774, 25558), (983, 20124), (1118, 17694), (1548, 12779), (1677, 11796), (1966, 10062), (2236, 8847), (2949, 6708), (3354, 5898), (3932, 5031)]