20090504

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:270

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 25269496

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 56, 58, 89, 116, 139, 178, 203, 232, 278, 356, 406, 556, 623, 712, 812, 973, 1112, 1246, 1624, 1946, 2492, 2581, 3892, 4031, 4984, 5162, 7784, 8062, 10324, 12371, 16124, 18067, 20648, 24742, 28217, 32248, 36134, 49484, 56434, 72268, 86597, 98968, 112868, 144536, 173194, 225736, 346388, 358759, 692776, 717518, 1435036, 2511313, 2870072, 5022626, 10045252, 20090504]

約数ペア:

[(1, 20090504), (2, 10045252), (4, 5022626), (7, 2870072), (8, 2511313), (14, 1435036), (28, 717518), (29, 692776), (56, 358759), (58, 346388), (89, 225736), (116, 173194), (139, 144536), (178, 112868), (203, 98968), (232, 86597), (278, 72268), (356, 56434), (406, 49484), (556, 36134), (623, 32248), (712, 28217), (812, 24742), (973, 20648), (1112, 18067), (1246, 16124), (1624, 12371), (1946, 10324), (2492, 8062), (2581, 7784), (3892, 5162), (4031, 4984)]