21739420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{3011}}^1$

素因数の和:3058

約数の個数: 36

約数和(自身を含む): 48198024

約数和(自身を除く): 26458604

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 3011, 3610, 6022, 7220, 12044, 15055, 30110, 57209, 60220, 114418, 228836, 286045, 572090, 1086971, 1144180, 2173942, 4347884, 5434855, 10869710, 21739420]

約数ペア:

[(1, 21739420), (2, 10869710), (4, 5434855), (5, 4347884), (10, 2173942), (19, 1144180), (20, 1086971), (38, 572090), (76, 286045), (95, 228836), (190, 114418), (361, 60220), (380, 57209), (722, 30110), (1444, 15055), (1805, 12044), (3011, 7220), (3610, 6022)]