21430955

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1$

素因数の和:148

約数の個数: 64

約数和(自身を含む): 34728960

約数和(自身を除く): 13298005

約数列:

[1, 5, 7, 13, 19, 35, 37, 65, 67, 91, 95, 133, 185, 247, 259, 335, 455, 469, 481, 665, 703, 871, 1235, 1273, 1295, 1729, 2345, 2405, 2479, 3367, 3515, 4355, 4921, 6097, 6365, 8645, 8911, 9139, 12395, 16549, 16835, 17353, 24605, 30485, 32227, 44555, 45695, 47101, 63973, 82745, 86765, 115843, 161135, 225589, 235505, 319865, 329707, 579215, 612313, 1127945, 1648535, 3061565, 4286191, 21430955]

約数ペア:

[(1, 21430955), (5, 4286191), (7, 3061565), (13, 1648535), (19, 1127945), (35, 612313), (37, 579215), (65, 329707), (67, 319865), (91, 235505), (95, 225589), (133, 161135), (185, 115843), (247, 86765), (259, 82745), (335, 63973), (455, 47101), (469, 45695), (481, 44555), (665, 32227), (703, 30485), (871, 24605), (1235, 17353), (1273, 16835), (1295, 16549), (1729, 12395), (2345, 9139), (2405, 8911), (2479, 8645), (3367, 6365), (3515, 6097), (4355, 4921)]