21971000

素因数分解:

$2^3\times 5^3\times {\mathrm{127}}^1\times {\mathrm{173}}^1$

素因数の和:321

約数の個数: 64

約数和(自身を含む): 52116480

約数和(自身を除く): 30145480

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 127, 173, 200, 250, 254, 346, 500, 508, 635, 692, 865, 1000, 1016, 1270, 1384, 1730, 2540, 3175, 3460, 4325, 5080, 6350, 6920, 8650, 12700, 15875, 17300, 21625, 21971, 25400, 31750, 34600, 43250, 43942, 63500, 86500, 87884, 109855, 127000, 173000, 175768, 219710, 439420, 549275, 878840, 1098550, 2197100, 2746375, 4394200, 5492750, 10985500, 21971000]

約数ペア:

[(1, 21971000), (2, 10985500), (4, 5492750), (5, 4394200), (8, 2746375), (10, 2197100), (20, 1098550), (25, 878840), (40, 549275), (50, 439420), (100, 219710), (125, 175768), (127, 173000), (173, 127000), (200, 109855), (250, 87884), (254, 86500), (346, 63500), (500, 43942), (508, 43250), (635, 34600), (692, 31750), (865, 25400), (1000, 21971), (1016, 21625), (1270, 17300), (1384, 15875), (1730, 12700), (2540, 8650), (3175, 6920), (3460, 6350), (4325, 5080)]