21558390

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{409}}^1$

素因数の和:677

約数の個数: 64

約数和(自身を含む): 59512320

約数和(自身を除く): 37953930

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210, 251, 409, 502, 753, 818, 1227, 1255, 1506, 1757, 2045, 2454, 2510, 2863, 3514, 3765, 4090, 5271, 5726, 6135, 7530, 8589, 8785, 10542, 12270, 14315, 17178, 17570, 26355, 28630, 42945, 52710, 85890, 102659, 205318, 307977, 513295, 615954, 718613, 1026590, 1437226, 1539885, 2155839, 3079770, 3593065, 4311678, 7186130, 10779195, 21558390]

約数ペア:

[(1, 21558390), (2, 10779195), (3, 7186130), (5, 4311678), (6, 3593065), (7, 3079770), (10, 2155839), (14, 1539885), (15, 1437226), (21, 1026590), (30, 718613), (35, 615954), (42, 513295), (70, 307977), (105, 205318), (210, 102659), (251, 85890), (409, 52710), (502, 42945), (753, 28630), (818, 26355), (1227, 17570), (1255, 17178), (1506, 14315), (1757, 12270), (2045, 10542), (2454, 8785), (2510, 8589), (2863, 7530), (3514, 6135), (3765, 5726), (4090, 5271)]